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Wiesner L, Araya S, Lovsin Barle E. Identifying non-hazardous substances in pharmaceutical manufacturing and setting default Health-Based Exposure Limits (HBELs). J Appl Toxicol 2022; 42:1443-1457. [PMID: 35315528 DOI: 10.1002/jat.4323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/02/2022] [Accepted: 03/16/2022] [Indexed: 11/07/2022]
Abstract
Contract Development and Manufacturing Organizations (CDMOs) that manufacture large, diverse portfolio of chemical and pharmaceutical substances require pragmatic risk-based decisions with respect to the safe carry-over between different chemical entities, as well as for worker protection. Additionally, CDMOs may not have access to primary study data or data is generally lacking for a specific substance. While pharmaceuticals require the establishment of health-based exposure limits (HBELs) (e.g., occupational exposure limits, permitted daily exposure limits), the limits for non-hazardous substances could be set in a protective and pragmatic way by using default values, when internally required. Since there is no aligned definition provided by authorities, nor agreed default values for non-hazardous substances, we provide a decision tree in order to help qualified experts (such as qualified toxicologists) to identify the group of non-hazardous substances and to assign default HBEL values for specific routes of exposure. The non-hazardous substances discussed within this publication are part of the following subgroups: (I) inactive pharmaceutical ingredients, (II) pharmaceutical excipients or cosmetic ingredients, (III) substances Generally Recognized as Safe (GRAS), and (IV) food ingredients, additives and contact materials. The proposed default limit values are 1 mg/m3 for the OEL, and 50 mg/day for the PDE oral and IV (intravenous) route.
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Barone TL, Lee T, Cauda EG, Mazzella AL, Stach R, Mizaikoff B. Segregation of respirable dust for chemical and toxicological analyses. ARCHIVES OF ENVIRONMENTAL & OCCUPATIONAL HEALTH 2020; 76:134-144. [PMID: 32552564 DOI: 10.1080/19338244.2020.1779018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Respirable dust can pass beyond ciliated airways of the respiratory tract and influence adverse health effects. Health effects can be studied using samples generated from bulk dust segregation. Because previous segregation methods diverge from size-selection criteria of the international convention for respirable particles (ICRP), a method was developed to approximate the ICRP. The method was compared to an ideal sampler by measuring the sample collection bias. The comparison shows that the uncertainty due to the bias was 0.10 based on European Standard EN13205:2014 criteria, which indicates that the segregator effectively follows the ICRP. Respirable particle size distributions were confirmed by an aerodynamic particle sizer and by computer-controlled scanning electron microscopy. Consequently, a systematic way to generate respirable powders for health effects studies and chemical analyses was developed.
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Affiliation(s)
- Teresa L Barone
- Pittsburgh Mining Research Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Pittsburgh, PA, USA
| | - Taekhee Lee
- Pittsburgh Mining Research Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Pittsburgh, PA, USA
| | - Emanuele G Cauda
- Pittsburgh Mining Research Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Pittsburgh, PA, USA
| | - Andrew L Mazzella
- Pittsburgh Mining Research Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Pittsburgh, PA, USA
| | - Robert Stach
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Ulm, Germany
| | - Boris Mizaikoff
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Ulm, Germany
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Mack SM, Madl AK, Pinkerton KE. Respiratory Health Effects of Exposure to Ambient Particulate Matter and Bioaerosols. Compr Physiol 2019; 10:1-20. [PMID: 31853953 PMCID: PMC7553137 DOI: 10.1002/cphy.c180040] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Researchers have been studying the respiratory health effects of ambient air pollution for more than 70 years. While air pollution as a whole can include gaseous, solid, and liquid constituents, this article focuses only on the solid and liquid fractions, termed particulate matter (PM). Although PM may contain anthropogenic, geogenic, and/or biogenic fractions, in this article, particles that originate from microbial, fungal, animal, or plant sources are distinguished from PM as bioaerosols. Many advances have been made toward understanding which particle and exposure characteristics most influence deposition and clearance processes in the respiratory tract. These characteristics include particle size, shape, charge, and composition as well as the exposure concentration and dose rate. Exposure to particles has been directly associated with the exacerbation and, under certain circumstances, onset of respiratory disease. The circumstances of exposure leading to disease are dependent on stressors such as human activity level and changing particle composition in the environment. Historically, researchers assumed that bioaerosols were too large to be inhaled into the deep lung, and thus, not applicable for study in conjunction with PM2.5 (the 2.5-μm and below size fraction that can reach the deep lung); however, this concept is beginning to be challenged. While there is extensive research on the health effects of PM and bioaerosols independent of each other, only limited work has been performed on their coexposure. Studying these two particle types as dual stressors to the respiratory system may aid in more thoroughly understanding the etiology of respiratory injury and disease. © 2020 American Physiological Society. Compr Physiol 10:1-20, 2020.
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Affiliation(s)
- Savannah M. Mack
- Center for Health and the Environment, John Muir Institute of the Environment, University of California, Davis, California, USA
| | - Amy K. Madl
- Center for Health and the Environment, John Muir Institute of the Environment, University of California, Davis, California, USA
| | - Kent E. Pinkerton
- Center for Health and the Environment, John Muir Institute of the Environment, University of California, Davis, California, USA
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Occupational Exposures in an Equestrian Centre to Respirable Dust and Respirable Crystalline Silica. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16173226. [PMID: 31484444 PMCID: PMC6747462 DOI: 10.3390/ijerph16173226] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 08/28/2019] [Accepted: 08/31/2019] [Indexed: 11/17/2022]
Abstract
Sand-based products are regularly used as footing material on indoor equestrian arenas, creating a potential occupational exposure risk for respirable crystalline silica (RCS) for equestrian workers training and exercising horses in these environments. The objective of this study was to evaluate an equestrian worker's personal RCS and respirable dust (RD) exposure. Sixteen personal full-shift RD measurements were collected from an equestrian worker and analysed for RD, quartz and cristobalite. Geometric mean exposures of 0.12 mg m-3 and 0.02 mg m-3 were calculated for RD and RCS concentrations, respectively. RCS exposures of between 0.01 to 0.09 mg m-3 were measured on days when the indoor arena surface was not watered, compared to lower exposures (<LOD-0.03 mg m-3) on days when the indoor arena was watered (p < 0.01); however, manual watering is time intensive and less likely to be implemented in practice. This small-scale study provides new data on RCS and RD exposures among equestrian workers. RCS exposures are within the range considered to be associated with increased risk for lung cancer. The use of dust control solutions such as water suppression should be promoted for equestrian work in horse riding arenas. Equestrian workers need to receive occupational health training on the health risks associated with RCS exposure.
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Poland CA, Duffin R. The toxicology of chrysotile-containing brake debris: implications for mesothelioma. Crit Rev Toxicol 2019; 49:11-35. [DOI: 10.1080/10408444.2019.1568385] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Craig A. Poland
- Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, UK
- Institute of Occupational Medicine, Edinburgh, UK
| | - Rodger Duffin
- Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, UK
- Concept Life Sciences, Dundee, UK
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Schulte PA, Kuempel ED, Drew NM. Characterizing risk assessments for the development of occupational exposure limits for engineered nanomaterials. Regul Toxicol Pharmacol 2018; 95:207-219. [PMID: 29574195 PMCID: PMC6075708 DOI: 10.1016/j.yrtph.2018.03.018] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 03/05/2018] [Accepted: 03/20/2018] [Indexed: 12/16/2022]
Abstract
The commercialization of engineered nanomaterials (ENMs) began in the early 2000's. Since then the number of commercial products and the number of workers potentially exposed to ENMs is growing, as is the need to evaluate and manage the potential health risks. Occupational exposure limits (OELs) have been developed for some of the first generation of ENMs. These OELs have been based on risk assessments that progressed from qualitative to quantitative as nanotoxicology data became available. In this paper, that progression is characterized. It traces OEL development through the qualitative approach of general groups of ENMs based primarily on read-across with other materials to quantitative risk assessments for nanoscale particles including titanium dioxide, carbon nanotubes and nanofibers, silver nanoparticles, and cellulose nanocrystals. These represent prototypic approaches to risk assessment and OEL development for ENMs. Such substance-by-substance efforts are not practical given the insufficient data for many ENMs that are currently being used or potentially entering commerce. Consequently, categorical approaches are emerging to group and rank ENMs by hazard and potential health risk. The strengths and limitations of these approaches are described, and future derivations and research needs are discussed. Critical needs in moving forward with understanding the health effects of the numerous EMNs include more standardized and accessible quantitative data on the toxicity and physicochemical properties of ENMs.
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Affiliation(s)
- P A Schulte
- National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, United States.
| | - E D Kuempel
- National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, United States
| | - N M Drew
- National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, United States
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Adetona O, Reinhardt TE, Domitrovich J, Broyles G, Adetona AM, Kleinman MT, Ottmar RD, Naeher LP. Review of the health effects of wildland fire smoke on wildland firefighters and the public. Inhal Toxicol 2016; 28:95-139. [PMID: 26915822 DOI: 10.3109/08958378.2016.1145771] [Citation(s) in RCA: 130] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Each year, the general public and wildland firefighters in the US are exposed to smoke from wildland fires. As part of an effort to characterize health risks of breathing this smoke, a review of the literature was conducted using five major databases, including PubMed and MEDLINE Web of Knowledge, to identify smoke components that present the highest hazard potential, the mechanisms of toxicity, review epidemiological studies for health effects and identify the current gap in knowledge on the health impacts of wildland fire smoke exposure. Respiratory events measured in time series studies as incidences of disease-caused mortality, hospital admissions, emergency room visits and symptoms in asthma and chronic obstructive pulmonary disease patients are the health effects that are most commonly associated with community level exposure to wildland fire smoke. A few recent studies have also determined associations between acute wildland fire smoke exposure and cardiovascular health end-points. These cardiopulmonary effects were mostly observed in association with ambient air concentrations of fine particulate matter (PM2.5). However, research on the health effects of this mixture is currently limited. The health effects of acute exposures beyond susceptible populations and the effects of chronic exposures experienced by the wildland firefighter are largely unknown. Longitudinal studies of wildland firefighters during and/or after the firefighting career could help elucidate some of the unknown health impacts of cumulative exposure to wildland fire smoke, establish occupational exposure limits and help determine the types of exposure controls that may be applicable to the occupation.
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Affiliation(s)
- Olorunfemi Adetona
- a Department of Environmental Health Science , College of Public Health, University of Georgia , Athens , GA , USA .,b Division of Environmental Health Sciences , College of Public Health, the Ohio State University , Columbus , OH , USA
| | - Timothy E Reinhardt
- c AMEC Foster Wheeler Environment & Infrastructure, Inc , Seattle , WA , USA
| | - Joe Domitrovich
- d USDA Forest Service, Missoula Technology and Development Center , Missoula , MT , USA
| | - George Broyles
- e SDA Forest Service, San Dimas Technology and Development Center , San Dimas , CA , USA
| | - Anna M Adetona
- a Department of Environmental Health Science , College of Public Health, University of Georgia , Athens , GA , USA
| | - Michael T Kleinman
- f Center for Occupational and Environmental Health, University of California , Irvine , CA , USA , and
| | - Roger D Ottmar
- g USDA Forest Service, Pacific Northwest Research Station , Seattle , WA , USA
| | - Luke P Naeher
- a Department of Environmental Health Science , College of Public Health, University of Georgia , Athens , GA , USA
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Morfeld P, Bruch J, Levy L, Ngiewih Y, Chaudhuri I, Muranko HJ, Myerson R, McCunney RJ. Translational toxicology in setting occupational exposure limits for dusts and hazard classification - a critical evaluation of a recent approach to translate dust overload findings from rats to humans. Part Fibre Toxicol 2015; 12:3. [PMID: 25925672 PMCID: PMC4443602 DOI: 10.1186/s12989-015-0079-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Accepted: 01/12/2015] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND We analyze the scientific basis and methodology used by the German MAK Commission in their recommendations for exposure limits and carcinogen classification of "granular biopersistent particles without known specific toxicity" (GBS). These recommendations are under review at the European Union level. We examine the scientific assumptions in an attempt to reproduce the results. MAK's human equivalent concentrations (HECs) are based on a particle mass and on a volumetric model in which results from rat inhalation studies are translated to derive occupational exposure limits (OELs) and a carcinogen classification. METHODS We followed the methods as proposed by the MAK Commission and Pauluhn 2011. We also examined key assumptions in the metrics, such as surface area of the human lung, deposition fractions of inhaled dusts, human clearance rates; and risk of lung cancer among workers, presumed to have some potential for lung overload, the physiological condition in rats associated with an increase in lung cancer risk. RESULTS The MAK recommendations on exposure limits for GBS have numerous incorrect assumptions that adversely affect the final results. The procedures to derive the respirable occupational exposure limit (OEL) could not be reproduced, a finding raising considerable scientific uncertainty about the reliability of the recommendations. Moreover, the scientific basis of using the rat model is confounded by the fact that rats and humans show different cellular responses to inhaled particles as demonstrated by bronchoalveolar lavage (BAL) studies in both species. CONCLUSION Classifying all GBS as carcinogenic to humans based on rat inhalation studies in which lung overload leads to chronic inflammation and cancer is inappropriate. Studies of workers, who have been exposed to relevant levels of dust, have not indicated an increase in lung cancer risk. Using the methods proposed by the MAK, we were unable to reproduce the OEL for GBS recommended by the Commission, but identified substantial errors in the models. Considerable shortcomings in the use of lung surface area, clearance rates, deposition fractions; as well as using the mass and volumetric metrics as opposed to the particle surface area metric limit the scientific reliability of the proposed GBS OEL and carcinogen classification.
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Affiliation(s)
- Peter Morfeld
- Institute for Occupational Epidemiology and Risk Assessment of Evonik Industries, AG Rellinghauser Straße 1-11, Essen, 45128, Germany.
- Institute and Policlinic for Occupational Medicine, Environmental Medicine and Preventive Research, University of Cologne, Cologne, Germany.
| | - Joachim Bruch
- University Duisburg-Essen, Medical Faculty, Essen, Germany.
- IBE GmbH, Cologne, Germany.
| | - Len Levy
- Cranfield University, ᅟ, Cranfield, UK.
| | | | | | | | - Ross Myerson
- Department of Occupational Health, MedStar Washington Hospital Center, Washington, DC, USA.
- The George Washington University School of Public Health, Washington, DC, USA.
| | - Robert J McCunney
- Massachusetts Institute of Technology, Cambridge, MA, USA.
- Brigham and Women's Hospital, Boston, MA, USA.
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Koponen IK, Koivisto AJ, Jensen KA. Worker Exposure and High Time-Resolution Analyses of Process-Related Submicrometre Particle Concentrations at Mixing Stations in Two Paint Factories. ANNALS OF OCCUPATIONAL HYGIENE 2015; 59:749-63. [DOI: 10.1093/annhyg/mev014] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 01/27/2015] [Indexed: 12/30/2022]
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Mølgaard B, Viitanen AK, Kangas A, Huhtiniemi M, Larsen ST, Vanhala E, Hussein T, Boor BE, Hämeri K, Koivisto AJ. Exposure to airborne particles and volatile organic compounds from polyurethane molding, spray painting, lacquering, and gluing in a workshop. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2015; 12:3756-73. [PMID: 25849539 PMCID: PMC4410214 DOI: 10.3390/ijerph120403756] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 03/16/2015] [Accepted: 03/24/2015] [Indexed: 12/07/2022]
Abstract
Due to the health risk related to occupational air pollution exposure, we assessed concentrations and identified sources of particles and volatile organic compounds (VOCs) in a handcraft workshop producing fishing lures. The work processes in the site included polyurethane molding, spray painting, lacquering, and gluing. We measured total VOC (TVOC) concentrations and particle size distributions at three locations representing the various phases of the manufacturing and assembly process. The mean working-hour TVOC concentrations in three locations studied were 41, 37, and 24 ppm according to photo-ionization detector measurements. The mean working-hour particle number concentration varied between locations from 3000 to 36,000 cm−3. Analysis of temporal and spatial variations of TVOC concentrations revealed that there were at least four substantial VOC sources: spray gluing, mold-release agent spraying, continuous evaporation from various lacquer and paint containers, and either spray painting or lacquering (probably both). The mold-release agent spray was indirectly also a major source of ultrafine particles. The workers’ exposure can be reduced by improving the local exhaust ventilation at the known sources and by increasing the ventilation rate in the area with the continuous source.
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Affiliation(s)
- Bjarke Mølgaard
- Department of Physics, University of Helsinki, P.O. Box 48, FI-00014 Helsinki, Finland.
| | - Anna-Kaisa Viitanen
- Nanosafety Research Centre, Finnish Institute of Occupational Health, Topeliuksenkatu 41 a A, FI-00250 Helsinki, Finland.
| | - Anneli Kangas
- Nanosafety Research Centre, Finnish Institute of Occupational Health, Topeliuksenkatu 41 a A, FI-00250 Helsinki, Finland.
| | - Marika Huhtiniemi
- Nanosafety Research Centre, Finnish Institute of Occupational Health, Topeliuksenkatu 41 a A, FI-00250 Helsinki, Finland.
| | - Søren Thor Larsen
- National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen DK-2100, Denmark.
| | - Esa Vanhala
- Nanosafety Research Centre, Finnish Institute of Occupational Health, Topeliuksenkatu 41 a A, FI-00250 Helsinki, Finland.
| | - Tareq Hussein
- Department of Physics, University of Helsinki, P.O. Box 48, FI-00014 Helsinki, Finland.
- Department of Physics, Faculty of Science, The University of Jordan, Amman, JO-11942, Jordan.
| | - Brandon E Boor
- Department of Physics, University of Helsinki, P.O. Box 48, FI-00014 Helsinki, Finland.
- Department of Civil, Architectural, and Environmental Engineering, The University of Texas at Austin, Austin, TX 78712, USA.
| | - Kaarle Hämeri
- Department of Physics, University of Helsinki, P.O. Box 48, FI-00014 Helsinki, Finland.
| | - Antti Joonas Koivisto
- Nanosafety Research Centre, Finnish Institute of Occupational Health, Topeliuksenkatu 41 a A, FI-00250 Helsinki, Finland.
- National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen DK-2100, Denmark.
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Moreno-Horn M, Gebel T. Granular biodurable nanomaterials: No convincing evidence for systemic toxicity. Crit Rev Toxicol 2014; 44:849-75. [DOI: 10.3109/10408444.2014.938802] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Kuempel ED, Attfield MD, Stayner LT, Castranova V. Human and animal evidence supports lower occupational exposure limits for poorly-soluble respirable particles: Letter to the Editor re: 'Low-toxicity dusts: Current exposure guidelines are not sufficiently protective' by Cherrie, Brosseau, Hay and Donaldson. ACTA ACUST UNITED AC 2014; 58:1205-8. [PMID: 25193937 DOI: 10.1093/annhyg/meu058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Eileen D Kuempel
- 1.National Institute for Occupational Safety and Health, Education and Information Division, 1090 Tusculum Avenue, Cincinnati, OH, USA;
| | - Michael D Attfield
- 2.National Institute for Occupational Safety and Health, Division of Respiratory Disease Studies, Morgantown, WV, USA
| | - Leslie T Stayner
- 3.University of Illinois at Chicago, School of Public Health, Division of Epidemiology and Biostatistics, Chicago, IL, USA
| | - Vincent Castranova
- 4.National Institute for Occupational Safety and Health, Health Effects Laboratory Division, Morgantown, WV, USA; 5.Department of Basic Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV, USA
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