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Higaki T, Nakamura Y, Tatsugami F, Fukumoto W, Awai K. Computer Simulation of the Effects of Contrast Protocols on Aortic Signal Intensity on Magnetic Resonance Angiograms. Curr Med Imaging 2021; 17:396-403. [PMID: 32748752 DOI: 10.2174/1573405616999200730180533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/27/2020] [Accepted: 06/20/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND While iodine-enhanced computed tomography has been studied, detailed information on gadolinium-enhanced magnetic resonance imaging has not been reported. OBJECTIVE We evaluated the effects of different gadolinium contrast agent (Gd-CA) factors on the enhancement of aortic magnetic resonance angiography (MRA) using computer simulation. METHODS We developed computer-simulation software that combines pharmacokinetic models and tables; it converts the blood concentration of particular Gd-CAs into the signal intensity (SI). We simulated aortic time-intensity curves (TIC) in our MRA study and compared the effect of the Gd-- CA volume, injection rate, and of different Gd-CAs on the TIC. RESULTS An increase in the Gd-CA volume from 14.0 to 28.0 ml increased maximal aortic intensity 1.11 times. Changing the injection rate from 1.0 to 2.8 ml/s increased it 1.10 times. The maximal SI of gadoterate-meglumine and gadobutrol was 1.03 and 1.01 times, respectively, that of gadoteridol. CONCLUSION In our computer-simulated MRA study, different Gd-CA factors resulted in no significant difference in the maximal aortic SI.
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Affiliation(s)
- Toru Higaki
- Department of Diagnostic Radiology, Graduate School of Biomedical and Health Sciences, Hiroshima University 1-2-3 Kasumi, Minami-Ku, Hiroshima, 734-8551, Japan
| | - Yuko Nakamura
- Department of Diagnostic Radiology, Graduate School of Biomedical and Health Sciences, Hiroshima University 1-2-3 Kasumi, Minami-Ku, Hiroshima, 734-8551, Japan
| | - Fuminari Tatsugami
- Department of Diagnostic Radiology, Graduate School of Biomedical and Health Sciences, Hiroshima University 1-2-3 Kasumi, Minami-Ku, Hiroshima, 734-8551, Japan
| | - Wataru Fukumoto
- Department of Diagnostic Radiology, Graduate School of Biomedical and Health Sciences, Hiroshima University 1-2-3 Kasumi, Minami-Ku, Hiroshima, 734-8551, Japan
| | - Kazuo Awai
- Department of Diagnostic Radiology, Graduate School of Biomedical and Health Sciences, Hiroshima University 1-2-3 Kasumi, Minami-Ku, Hiroshima, 734-8551, Japan
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Alfano G, Fontana F, Ferrari A, Solazzo A, Perrone R, Giaroni F, Torricelli P, Cappelli G. Incidence of nephrogenic systemic fibrosis after administration of gadoteric acid in patients on renal replacement treatment. Magn Reson Imaging 2020; 70:1-4. [PMID: 32112811 DOI: 10.1016/j.mri.2020.02.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 02/20/2020] [Accepted: 02/21/2020] [Indexed: 11/21/2022]
Abstract
PURPOSE Nephrogenic system fibrosis (NSF) is a rare complication detected in patients with renal insufficiency exposed to gadolinium-based contrast agents (GBCAs). The aim of our study is to evaluate the prevalence of NSF in a cohort of patients on renal replacement treatment who underwent GBCA-enhanced magnetic resonance imaging (MRI). METHOD We retrospectively reviewed all the charts of kidney transplant (KT) recipients, patients on hemodialysis (HD) and peritoneal dialysis (PD) who received a uniform protocol for contrast material enhanced-MRI with gadoteric acid at our center from January 2004 to December 2017. RESULTS Three-hundred forty-four patients (44.1% on HD, 11.3% on PD and 44.4% KT recipients) underwent 551 gadoteric acid-enhanced MRI. The median age of the patients was 58 years (IQR, 45-70 years) and 65.1% were men. Sixty-three patients (18.3%) had skin punch biopsy after integumentary assessment performed by a dermatologist. No cases of NSF were detected after a median follow-up of 4.5 years (IQR, 1.9-8.2 years). During this period of observation, 116 (33.7%) patients died and 11 (3.1%) were lost at follow-up. CONCLUSIONS None of the patients exposed to gadoteric acid developed NSF. Our results, in line with more recent studies, suggest that the use of gadoteric acid, a macrocyclic GBCA, appears safe even in chronic kidney disease (CKD) patients receiving dialysis.
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Onwuharine EN, Clark AJ. Comparison of double inversion recovery magnetic resonance imaging (DIR-MRI) and dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) in detection of prostate cancer: A pilot study. Radiography (Lond) 2020; 26:234-239. [PMID: 32052752 DOI: 10.1016/j.radi.2019.12.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 12/12/2019] [Accepted: 12/16/2019] [Indexed: 01/09/2023]
Abstract
INTRODUCTION DCE-MRI is established for detecting prostate cancer (PCa). However, it requires a gadolinium contrast agent, with potential risks for patients. The application of DIR-MRI is simple and may allow cancer detection without the use of an intravenous contrast agent by differentially nullifying signal from normal and abnormal prostate tissue, creating contrast between the cancer and background normal prostate. In this pilot study we gathered data from DIR-MRI and DCE-MRI of the prostate for an equivalence trial. We also looked at how the DIR-MRI appearance varies with the aggressiveness of PCa. METHOD DIR-MRI and DCE-MRI were acquired. The images were assessed by an experienced Consultant Radiologist and a novice reporter (Radiographer). The potential PCa lesions were quantified using a lesion to normal ratio (LNR). Radiological pathological correlation was made to identify the MRI lesions that represented significant PCa. A Wilcoxon sign rank was used to compare DCE-LNR and DIR-LNR for PCa containing lesions. Pearson's correlation was used to look at the relationship between DIR-LNR and PCa grade group (aggressiveness). RESULTS DCE-LNR and DIR-LNR were found to be significantly different (Z = -5.910, p < 0.001). However, a significant correlation was found between PCa grade group and DIR-LNR. CONCLUSION DIR and DCE sequences are not equivalent and significant cancer is more conspicuous on the DCE sequence. However, DIR-LNR does correlate with PCa aggressiveness. IMPLICATIONS FOR PRACTICE With the correlation of PCa grade group with DIR-LNR this may be a useful sequence in evaluation of the prostate; stratifying the risk of there being clinically significant PCa before biopsy is performed. Furthermore, given that DIR-LNR appears to predict PCa aggressiveness DIR might be used as part of a multiparametric MRI protocol designed to avoid biopsy.
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Affiliation(s)
- E N Onwuharine
- Radiology Department, University Hospitals of North Midlands (UHNM) NHS Trust, UK.
| | - A J Clark
- Radiology Department, University Hospitals of North Midlands (UHNM) NHS Trust, UK.
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Lim J, Park EA, Song YS, Lee W. Single-Dose Gadoterate Meglumine for 3T Late Gadolinium Enhancement MRI for the Assessment of Chronic Myocardial Infarction: Intra-Individual Comparison with Conventional Double-Dose 1.5T MRI. Korean J Radiol 2018; 19:372-380. [PMID: 29713214 PMCID: PMC5904463 DOI: 10.3348/kjr.2018.19.3.372] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 11/01/2017] [Indexed: 11/25/2022] Open
Abstract
Objective To intra-individually compare 3T magnetic resonance (MR) images obtained with one dose gadoterate meglumine to 1.5T MR using conventional double dose for assessment of chronic myocardial infarction. Materials and Methods Sixteen patients diagnosed with chronic myocardial infarctions were examined on single-dose 3T MR within two weeks after undergoing double-dose 1.5T MR. Representative short-axis images were acquired at three points after administration of gadoterate meglumine. Contrast-to-noise ratios between infarcted and normal myocardium (CNRinfarct-normal) and between infarct and left ventricular cavity (CNRinfarct-LVC) were calculated and compared intra-individually at each temporal scan. Additionally, two independent readers assessed relative infarct size semi-automatically and inter-observer reproducibility was evaluated using intraclass correlation coefficient. Results While higher CNRinfarct-normal was revealed at single-dose 3T at only 10 minutes scan (p = 0.047), the CNRinfarct-LVC was higher at single-dose 3T MR at each temporal scan (all, p < 0.05). Measurement of relative infarct size was not significantly different between both examinations for both observers (all, p > 0.05). However, inter-observer reproducibility was higher at single-dose 3T MR (all, p < 0.05). Conclusion Single-dose 3T MR is as effective as double-dose 1.5T MR for delineation of infarcted myocardium while being superior in detection of infarcted myocardium from the blood cavity, and provides better reproducibility for infarct size quantification.
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Affiliation(s)
- Jiyeon Lim
- Department of Radiology, Seoul National University Hospital, Seoul 03080, Korea
| | - Eun-Ah Park
- Department of Radiology, Seoul National University Hospital, Seoul 03080, Korea
| | - Yong Sub Song
- Department of Radiology, Seoul National University Hospital, Seoul 03080, Korea
| | - Whal Lee
- Department of Radiology, Seoul National University Hospital, Seoul 03080, Korea
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Consolino L, Longo DL, Sciortino M, Dastrù W, Cabodi S, Giovenzana GB, Aime S. Assessing tumor vascularization as a potential biomarker of imatinib resistance in gastrointestinal stromal tumors by dynamic contrast-enhanced magnetic resonance imaging. Gastric Cancer 2017; 20:629-639. [PMID: 27995483 PMCID: PMC5486478 DOI: 10.1007/s10120-016-0672-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 11/20/2016] [Indexed: 02/07/2023]
Abstract
BACKGROUND Most metastatic gastrointestinal stromal tumors (GISTs) develop resistance to the first-line imatinib treatment. Recently, increased vessel density and angiogenic markers were reported in GISTs with a poor prognosis, suggesting that angiogenesis is implicated in GIST tumor progression and resistance. The purpose of this study was to investigate the relationship between tumor vasculature and imatinib resistance in different GIST mouse models using a noninvasive magnetic resonance imaging (MRI) functional approach. METHODS Immunodeficient mice (n = 8 for each cell line) were grafted with imatinib-sensitive (GIST882 and GIST-T1) and imatinib-resistant (GIST430) human cell lines. Dynamic contrast-enhanced MRI (DCE-MRI) was performed on GIST xenografts to quantify tumor vessel permeability (K trans) and vascular volume fraction (v p). Microvessel density (MVD), permeability (mean dextran density, MDD), and angiogenic markers were evaluated by immunofluorescence and western blot assays. RESULTS Dynamic contrast-enhanced magnetic resonance imaging showed significantly increased vessel density (P < 0.0001) and permeability (P = 0.0002) in imatinib-resistant tumors compared to imatinib-sensitive ones. Strong positive correlations were observed between MRI estimates, K trans and v p, and their related ex vivo values, MVD (r = 0.78 for K trans and r = 0.82 for v p) and MDD (r = 0.77 for K trans and r = 0.94 for v p). In addition, higher expression of vascular endothelial growth factor receptors (VEGFR2 and VEFGR3) was seen in GIST430. CONCLUSIONS Dynamic contrast-enhanced magnetic resonance imaging highlighted marked differences in tumor vasculature and microenvironment properties between imatinib-resistant and imatinib-sensitive GISTs, as also confirmed by ex vivo assays. These results provide new insights into the role that DCE-MRI could play in GIST characterization and response to GIST treatment. Validation studies are needed to confirm these findings.
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Affiliation(s)
- Lorena Consolino
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Via Nizza 52, 10126 Turin, Italy ,CAGE Chemicals srl, Via Bovio 6, 28100 Novara, Italy
| | - Dario Livio Longo
- Institute of Biostructure and Bioimaging, National Research Council of Italy (CNR) c/o Molecular Biotechnologies Center, Via Nizza 52, 10126 Turin, Italy
| | - Marianna Sciortino
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Via Nizza 52, 10126 Turin, Italy
| | - Walter Dastrù
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Via Nizza 52, 10126 Turin, Italy
| | - Sara Cabodi
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Via Nizza 52, 10126 Turin, Italy
| | - Giovanni Battista Giovenzana
- CAGE Chemicals srl, Via Bovio 6, 28100 Novara, Italy ,Department of Pharmaceutical Sciences, University of Eastern Piedmont, Largo Donegani 2/3, 28100 Novara, Italy
| | - Silvio Aime
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Via Nizza 52, 10126 Turin, Italy
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Zhou Z, Han Z, Lu ZR. A targeted nanoglobular contrast agent from host-guest self-assembly for MR cancer molecular imaging. Biomaterials 2016; 85:168-79. [PMID: 26874280 PMCID: PMC5412079 DOI: 10.1016/j.biomaterials.2016.02.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 02/01/2016] [Accepted: 02/01/2016] [Indexed: 12/21/2022]
Abstract
The clinical application of nanoparticular Gd(III) based contrast agents for tumor molecular MRI has been hindered by safety concerns associated with prolonged tissue retention, although they can produce strong tumor enhancement. In this study, a targeted well-defined cyclodextrin-based nanoglobular contrast agent was developed through self-assembly driven by host-guest interactions for safe and effective cancer molecular MRI. Multiple β-cyclodextrins attached POSS (polyhedral oligomeric silsesquioxane) nanoglobule was used as host molecule. Adamantane-modified macrocyclic Gd(III) contrast agent, cRGD (cyclic RGDfK peptide) targeting ligand and fluorescent probe was used as guest molecules. The targeted host-guest nanoglobular contrast agent cRGD-POSS-βCD-(DOTA-Gd) specifically bond to αvβ3 integrin in malignant 4T1 breast tumor and provided greater contrast enhancement than the corresponding non-targeted agent. The agent also provided significant fluorescence signal in tumor tissue. The histological analysis of the tumor tissue confirmed its specific and effective targeting to αvβ3 integrin. The targeted imaging agent has a potential for specific cancer molecular MR and fluorescent imaging.
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Affiliation(s)
- Zhuxian Zhou
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA; Center for Bionanoengineering and State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Zhen Han
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Zheng-Rong Lu
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA.
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Longo DL, Arena F, Consolino L, Minazzi P, Geninatti-Crich S, Giovenzana GB, Aime S. Gd-AAZTA-MADEC, an improved blood pool agent for DCE-MRI studies on mice on 1 T scanners. Biomaterials 2015; 75:47-57. [PMID: 26480471 DOI: 10.1016/j.biomaterials.2015.10.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 09/30/2015] [Accepted: 10/05/2015] [Indexed: 10/22/2022]
Abstract
A novel MRI blood-pool contrast agent (Gd-AAZTA-MADEC) has been compared with established blood pool agents for tumor contrast enhanced images and angiography. Synthesis, relaxometric properties, albumin binding affinity and pharmacokinetic profiles are reported. For in vivo studies, angiographic images and tumor contrast enhanced images were acquired on mice with benchtop 1T-MRI scanners and compared with MS-325, B22956/1 and B25716/1. The design of this contrast agent involved the elongation of the spacer between the targeting deoxycholic acid moiety and the Gd-AAZTA imaging reporting unit that drastically changed either the binding affinity to albumin (KA(HSA) = 8.3 × 10(5) M(-1)) and the hydration state of the Gd ion (q = 2) in comparison to the recently reported B25716/1. The very markedly high binding affinity towards mouse and human serum albumins resulted in peculiar pharmacokinetics and relaxometric properties. The NMRD profiles clearly indicated that maximum efficiency is attainable at magnetic field strength of 1 T. In vivo studies showed high enhancement of the vasculature and a prolonged accumulation inside tumor. The herein reported pre-clinical imaging studies show that a great benefit arises from the combination of a benchtop MRI scanner operating at 1 T and the albumin-binding Gd-AAZTA-MADEC complex, for pursuing enhanced angiography and improved characterization of tumor vascular microenvironment.
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Affiliation(s)
- Dario Livio Longo
- Istituto di Biostrutture e Bioimmagini (CNR) c/o Molecular Biotechnology Center, Via Nizza 52, 10126, Torino, Italy; Molecular Imaging Center, University of Torino, Via Nizza 52, 10126, Torino, Italy.
| | - Francesca Arena
- Molecular Imaging Center, University of Torino, Via Nizza 52, 10126, Torino, Italy; Department of Molecular Biotechnology and Health Sciences, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Lorena Consolino
- Molecular Imaging Center, University of Torino, Via Nizza 52, 10126, Torino, Italy; Department of Molecular Biotechnology and Health Sciences, University of Torino, Via Nizza 52, 10126, Torino, Italy; CAGE Chemicals Srl, Via Bovio 6, 28100, Novara, Italy
| | - Paolo Minazzi
- Dipartimento di Scienze del Farmaco, Università del Piemonte Orientale "A. Avogadro" Largo Donegani 2/3, 28100, Novara, Italy; CAGE Chemicals Srl, Via Bovio 6, 28100, Novara, Italy
| | - Simonetta Geninatti-Crich
- Molecular Imaging Center, University of Torino, Via Nizza 52, 10126, Torino, Italy; Department of Molecular Biotechnology and Health Sciences, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Giovanni Battista Giovenzana
- Dipartimento di Scienze del Farmaco, Università del Piemonte Orientale "A. Avogadro" Largo Donegani 2/3, 28100, Novara, Italy; CAGE Chemicals Srl, Via Bovio 6, 28100, Novara, Italy
| | - Silvio Aime
- Istituto di Biostrutture e Bioimmagini (CNR) c/o Molecular Biotechnology Center, Via Nizza 52, 10126, Torino, Italy; Molecular Imaging Center, University of Torino, Via Nizza 52, 10126, Torino, Italy; Department of Molecular Biotechnology and Health Sciences, University of Torino, Via Nizza 52, 10126, Torino, Italy
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Stokes AM, Skinner JT, Quarles CC. Assessment of a combined spin- and gradient-echo (SAGE) DSC-MRI method for preclinical neuroimaging. Magn Reson Imaging 2014; 32:1181-90. [PMID: 25172987 DOI: 10.1016/j.mri.2014.08.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 07/30/2014] [Accepted: 08/09/2014] [Indexed: 11/28/2022]
Abstract
The goal of this study was to optimize and validate a combined spin- and gradient-echo (SAGE) sequence for dynamic susceptibility-contrast magnetic resonance imaging to obtain hemodynamic parameters in a preclinical setting. The SAGE EPI sequence was applied in phantoms and in vivo rat brain (normal, tumor, and stroke tissue). Partial and full Fourier encoding schemes were implemented and characterized. Maps of cerebral blood volume (CBV), cerebral blood flow (CBF), mean transit time (MTT), vessel size index (VSI), volume transfer constant (K(trans)), and volume fraction of the extravascular extracellular space (ve) were obtained. Partial Fourier encoding provided shortened echo times with acceptable signal-to-noise ratio and temporal stability, thus enabling reliable characterization of T2, T2(*) and T1 in both phantoms and rat brain. The hemodynamic parameters CBV, CBF, and MTT for gradient-echo and spin-echo contrast were determined in tumor and stroke; VSI, K(trans), and ve were also computed in tumor tissue. The SAGE EPI sequence allows the acquisition of multiple gradient- and spin-echoes, from which measures of perfusion, permeability, and vessel size can be obtained in a preclinical setting. Partial Fourier encoding can be used to minimize SAGE echo times and reliably quantify dynamic T2 and T2(*) changes. This acquisition provides a more comprehensive assessment of hemodynamic status in brain tissue with vascular and perfusion abnormalities.
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Affiliation(s)
- Ashley M Stokes
- Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN 37232, USA; Institute of Imaging Science, Vanderbilt University, Nashville, TN 37232, USA
| | - Jack T Skinner
- Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN 37232, USA; Institute of Imaging Science, Vanderbilt University, Nashville, TN 37232, USA
| | - C Chad Quarles
- Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN 37232, USA; Institute of Imaging Science, Vanderbilt University, Nashville, TN 37232, USA.
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