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Borouman S, Sigaroodi F, Ahmadi Tafti SM, Khoshmaram K, Soleimani M, Khani MM. ECM-based bioadhesive hydrogel for sutureless repair of deep anterior corneal defects. Biomater Sci 2024; 12:2356-2368. [PMID: 38497791 DOI: 10.1039/d4bm00129j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Corneal transplantation is the gold standard treatment for corneal-related blindness; however, this strategy faces challenges such as limited donor cornea, graft rejection, suture-related complications, and the need for specialized equipment and advanced surgical skills. Development of tissue adhesives for corneal regeneration is of great clinical value. However, currently available corneal tissue sealants pose challenges, such as lack of safety, biocompatibility, and desired mechanical properties. To meet these requirements simultaneously, a bovine stromal corneal extracellular matrix (dCor) was used to design a bioadhesive photocurable hydrogel based on gelatin methacrylate (GelMA) and polyethylene glycol diacrylate (PEGDA) hydrogels (dCor/Gel-PEG). Integration of dCor into the dual networks of GelMA and PEGDA (Gel-PEG) led to a bioadhesive hydrogel for curing corneal defects, which could be crosslinked by Irgacure 2959 within 5 min ultraviolet irradiation. The viability of corneal stromal stem cells (CSSCs) was improved on the dCor/Gel-PEG hydrogel in comparison to the Gel-PEG hydrogel. The gene expression profile supported the keratocyte differentiation of CSSCs seeded on dCor/Gel-PEG via increased KERA and ALDH, with inhibited myofibroblast transdifferentiation via decreased α-SMA due to the presence of dCor. Interestingly, the dCor/Gel-PEG hydrogel exhibited favorable mechanical performance in terms of elasticity and bioadherence to the host corneal stroma. Ex vivo and in vivo examinations proved the feasibility of this hydrogel for the sutureless reconstruction of deep anterior corneal defects with promising histopathological results.
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Affiliation(s)
- Safieh Borouman
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Faraz Sigaroodi
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Seyed Mohsen Ahmadi Tafti
- Research Center for Advanced Technologies in Cardiovascular Medicine, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran 1411713138, Iran
| | - Keyvan Khoshmaram
- Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran (1417935840), Tehran, Iran
| | - Masoud Soleimani
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Mohammad-Mehdi Khani
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Hui J, Nie X, Wei P, Deng J, Kang Y, Tang K, Han G, Wang L, Liu W, Han Q. 3D printed fibroblast-loaded hydrogel for scleral remodeling to prevent the progression of myopia. J Mater Chem B 2024; 12:2559-2570. [PMID: 38362614 DOI: 10.1039/d3tb02548a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
Pathologic myopia has seriously jeopardized the visual health of adolescents in the past decades. The progression of high myopia is associated with a decrease in collagen aggregation and thinning of the sclera, which ultimately leads to longer eye axis length and image formation in front of the retina. Herein, we report a fibroblast-loaded hydrogel as a posterior scleral reinforcement (PSR) surgery implant for the prevention of myopia progression. The fibroblast-loaded gelatin methacrylate (GelMA)-poly(ethylene glycol) diacrylate (PEGDA) hydrogel was prepared through bioprinting with digital light processing (DLP). The introduction of the PEGDA component endowed the GelMA-PEGDA hydrogel with a high compression modulus for PRS surgery. The encapsulated fibroblasts could consistently maintain a high survival rate during 7 days of in vitro incubation, and could normally secrete collagen type I. Eventually, both the hydrogel and fibroblast-loaded hydrogel demonstrated an effective shortening of the myopic eye axis length in a guinea pig model of visual deprivation over three weeks after implantation, and the sclera thickness of myopic guinea pigs became significantly thicker after 4 weeks, verifying the success of sclera remodeling and showing that myopic progression was effectively controlled. In particular, the fibroblast-loaded hydrogel demonstrated the best therapeutic effect through the synergistic effect of cell therapy and PSR surgery.
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Affiliation(s)
- Jingwen Hui
- Tianjin Eye Hospital, No. 4 Gansu Road, Heping District, Tianjin 300020, China.
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
- Clinical College of Ophthalmology Tianjin Medical University, Tianjin Medical University, Tianjin, China
| | - Xiongfeng Nie
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Pinghui Wei
- Tianjin Eye Hospital, No. 4 Gansu Road, Heping District, Tianjin 300020, China.
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
- Clinical College of Ophthalmology Tianjin Medical University, Tianjin Medical University, Tianjin, China
| | - Jie Deng
- Tianjin Eye Hospital, No. 4 Gansu Road, Heping District, Tianjin 300020, China.
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
| | - Yuanzhe Kang
- Tianjin Eye Hospital, No. 4 Gansu Road, Heping District, Tianjin 300020, China.
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
- Clinical College of Ophthalmology Tianjin Medical University, Tianjin Medical University, Tianjin, China
| | - Kexin Tang
- Tianjin Eye Hospital, No. 4 Gansu Road, Heping District, Tianjin 300020, China.
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
- Clinical College of Ophthalmology Tianjin Medical University, Tianjin Medical University, Tianjin, China
| | - Guoge Han
- Tianjin Eye Hospital, No. 4 Gansu Road, Heping District, Tianjin 300020, China.
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
- Clinical College of Ophthalmology Tianjin Medical University, Tianjin Medical University, Tianjin, China
| | - Ling Wang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin 300071, China
| | - Wenguang Liu
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Quanhong Han
- Tianjin Eye Hospital, No. 4 Gansu Road, Heping District, Tianjin 300020, China.
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
- Clinical College of Ophthalmology Tianjin Medical University, Tianjin Medical University, Tianjin, China
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Nie X, Tang Y, Wu T, Zhao X, Xu Z, Yang R, Sun Y, Wu B, Han Q, Hui J, Liu W. 3D printing sequentially strengthening high-strength natural polymer hydrogel bilayer scaffold for cornea regeneration. Regen Biomater 2024; 11:rbae012. [PMID: 38454966 PMCID: PMC10918636 DOI: 10.1093/rb/rbae012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 01/21/2024] [Accepted: 01/27/2024] [Indexed: 03/09/2024] Open
Abstract
3D printing of high-strength natural polymer biodegradable hydrogel scaffolds simultaneously resembling the biomechanics of corneal tissue and facilitating tissue regeneration remains a huge challenge due to the inherent brittleness of natural polymer hydrogels and the demanding requirements of printing. Herein, concentrated aqueous solutions of gelatin and carbohydrazide-modified alginate (Gel/Alg-CDH) are blended to form a natural polymer hydrogel ink, where the hydrazides in Alg-CDH are found to form strong hydrogen bonds with the gelatin. The hydrogen-bonding-strengthened Gel/Alg-CDH hydrogel demonstrates an appropriate thickened viscosity and shear thinning for extrusion printing. The strong hydrogen bonds contribute to remarkably increased mechanical properties of Gel/Alg-CDH hydrogel with a maximum elongation of over 400%. In addition, sequentially Ca2+-physical crosslinking and then moderately chemical crosslinking significantly enhance the mechanical properties of Gel/Alg-CDH hydrogels that ultimately exhibit an intriguing J-shaped stress-strain curve (tensile strength of 1.068 MPa and the toughness of 677.6 kJ/m2). The dually crosslinked Gel-Alg-CDH-Ca2+-EDC hydrogels demonstrate a high transparency, physiological swelling stability and rapid enzymatic degradability, as well as suturability. The growth factor and drug-loaded biomimetic bilayer hydrogel scaffold are customized via a multi-nozzle printing system. This bioactive bilayer hydrogel scaffold considerably promotes regeneration of corneal epithelium and stroma and inhibits cornea scarring in rabbit cornea keratoplasty.
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Affiliation(s)
- Xiongfeng Nie
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Yong Tang
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin Eye Institute, Tianjin 300020, China
| | - Tengling Wu
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Xinrui Zhao
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Ziyang Xu
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Rong Yang
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Yage Sun
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Bin Wu
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin Eye Institute, Tianjin 300020, China
| | - Quanhong Han
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin Eye Institute, Tianjin 300020, China
| | - Jingwen Hui
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin Eye Institute, Tianjin 300020, China
| | - Wenguang Liu
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
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Zheng Y, Shariati K, Ghovvati M, Vo S, Origer N, Imahori T, Kaneko N, Annabi N. Hemostatic patch with ultra-strengthened mechanical properties for efficient adhesion to wet surfaces. Biomaterials 2023; 301:122240. [PMID: 37480758 DOI: 10.1016/j.biomaterials.2023.122240] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 06/15/2023] [Accepted: 07/06/2023] [Indexed: 07/24/2023]
Abstract
Controlling traumatic bleeding from damaged internal organs while effectively sealing the wound is critical for saving the lives of patients. Existing bioadhesives suffer from blood incompatibility, insufficient adhesion to wet surfaces, weak mechanical properties, and complex application procedures. Here, we engineered a ready-to-use hemostatic bioadhesive with ultra-strengthened mechanical properties and fatigue resistance, robust adhesion to wet tissues within a few seconds of gentle pressing, deformability to accommodate physiological function and action, and the ability to stop bleeding efficiently. The engineered hydrogel, which demonstrated high elasticity (>900%) and toughness (>4600 kJ/m3), was formed by fine-tuning a series of molecular interactions and crosslinking mechanisms involving N-hydroxysuccinimide (NHS) conjugated alginate (Alg-NHS), poly (ethylene glycol) diacrylate (PEGDA), tannic acid (TA), and Fe3+ ions. Dual adhesive moieties including mussel-inspired pyrogallol/catechol and NHS synergistically enhanced wet tissue adhesion (>400 kPa in a wound closure test). In conjunction with physical sealing, the high affinity of TA/Fe3+ for blood could further augment hemostasis. The engineered bioadhesive demonstrated excellent in vitro and in vivo biocompatibility as well as improved hemostatic efficacy as compared to commercial Surgicel®. Overall, the hydrogel design strategy described herein holds great promise for overcoming existing obstacles impeding clinical translation of engineered hemostatic bioadhesives.
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Affiliation(s)
- Yuting Zheng
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Kaavian Shariati
- David Geffen School of Medicine, University of California - Los Angeles, Los Angeles, CA 90095, USA
| | - Mahsa Ghovvati
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA; Division of Interventional Neuroradiology, Department of Radiological Sciences, David Geffen School of Medicine, University of California - Los Angeles, Los Angeles, CA 90095, USA
| | - Steven Vo
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Nolan Origer
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Taichiro Imahori
- Division of Interventional Neuroradiology, Department of Radiological Sciences, David Geffen School of Medicine, University of California - Los Angeles, Los Angeles, CA 90095, USA
| | - Naoki Kaneko
- Division of Interventional Neuroradiology, Department of Radiological Sciences, David Geffen School of Medicine, University of California - Los Angeles, Los Angeles, CA 90095, USA
| | - Nasim Annabi
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA; Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA 90095, United States.
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Goto E, Tagami T, Ogawa K, Ozeki T. Fabrication of 3D-Printed Contact Lens Composed of Polyethylene Glycol Diacrylate for Controlled Release of Azithromycin. Biol Pharm Bull 2023; 46:1461-1467. [PMID: 37779048 DOI: 10.1248/bpb.b23-00443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
Since three-dimensional (3D)-printed tablets were approved by the United States Food and Drug Administration (FDA), 3D printing technology has garnered increasing interest for the fabrication of medical and pharmaceutical devices. With various dosing devices being designed for manufacture by 3D printing, 3D-printed ophthalmic formulations to release drugs have been one such target of investigation. In the current study, 3D-printed contact lenses designed for the controlled release of the antibiotic azithromycin were produced by vat photopolymerization, and the effect of the printer ink composition and a second curing process was investigated. The azithromycin-loaded contact lenses were composed of the cross-linking reagent polyethylene glycol diacrylate (PEGDA), PEG 400 as a solvent, a photoinitiator, and azithromycin. The 3D-printed contact lenses were fabricated successfully, and formulations with lower PEGDA concentrations produced thicker lenses. The mechanical strength of the PEGDA-based contact lenses was dependent on the amount of PEGDA and was improved by a second curing process. Drug release from 3D-printed contact lenses was reduced in the samples with a second curing process. The azithromycin-loaded contact lenses exhibited antimicrobial effects in vitro for both Gram-positive and -negative bacteria. These results suggest that 3D-printed contact lenses containing antibiotics are an effective model for treating eye infections by controlling drug release.
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Affiliation(s)
- Eiichi Goto
- Drug Delivery and Nano Pharmaceutics, Graduate School of Pharmaceutical Sciences, Nagoya City University
| | - Tatsuaki Tagami
- Drug Delivery and Nano Pharmaceutics, Graduate School of Pharmaceutical Sciences, Nagoya City University
| | - Koki Ogawa
- Drug Delivery and Nano Pharmaceutics, Graduate School of Pharmaceutical Sciences, Nagoya City University
| | - Tetsuya Ozeki
- Drug Delivery and Nano Pharmaceutics, Graduate School of Pharmaceutical Sciences, Nagoya City University
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He B, Wang J, Xie M, Xu M, Zhang Y, Hao H, Xing X, Lu W, Han Q, Liu W. 3D printed biomimetic epithelium/stroma bilayer hydrogel implant for corneal regeneration. Bioact Mater 2022; 17:234-247. [PMID: 35386466 PMCID: PMC8965162 DOI: 10.1016/j.bioactmat.2022.01.034] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/11/2022] [Accepted: 01/17/2022] [Indexed: 12/11/2022] Open
Abstract
Corneal regeneration has always been a challenge due to its sophisticated structure and undesirable keratocyte-fibroblast transformation. Herein, we propose 3D printing of a biomimetic epithelium/stroma bilayer implant for corneal regeneration. Gelatin methacrylate (GelMA) and long-chain poly(ethylene glycol) diacrylate (PEGDA) are blended to form a two-component ink, which can be printed to different mechanically robust programmed PEGDA-GelMA objects by Digital Light Processing (DLP) printing technology, due to the toughening effect of crystalline crosslinks from long-chain PEGDA on GelMA hydrogel after photo-initiated copolymerization. The printed PEGDA-GelMA hydrogels support cell adhesion, proliferation, migration, meanwhile demonstrating a high light transmittance, and an appropriate swelling degree, nutrient permeation and degradation rate. A bi-layer dome-shaped corneal scaffold consisting of rabbit corneal epithelial cells (rCECs)-laden epithelia layer and rabbit adipose-derived mesenchymal stem cells (rASCs)-laden orthogonally aligned fibrous stroma layer can be printed out with a high fidelity and robustly surgical handling ability. This bi-layer cells-laden corneal scaffold is applied in a rabbit keratoplasty model. The post-operative outcome reveals efficient sealing of corneal defects, re-epithelialization and stromal regeneration. The concerted effects of microstructure of 3D printed corneal scaffold and precisely located cells in epithelia and stroma layer provide an optimal topographical and biological microenvironment for corneal regeneration. Crystalline microphase of long PEGDA is employed to toughen GelMA hydrogel. A bi-layer dome-shaped robust hydrogel-based biomimetic corneal scaffold is printed. The 3D printed cornea implant can efficiently repair the rabbits' corneal defect.
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Khosravimelal S, Mobaraki M, Eftekhari S, Ahearne M, Seifalian AM, Gholipourmalekabadi M. Hydrogels as Emerging Materials for Cornea Wound Healing. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2006335. [PMID: 33887108 DOI: 10.1002/smll.202006335] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 12/15/2020] [Indexed: 06/12/2023]
Abstract
Hydrogel biomaterials have many favorable characteristics including tuneable mechanical behavior, cytocompatibility, optical properties suitable for regeneration and restoration of the damaged cornea tissue. The cornea is a tissue susceptible to various injuries and traumas with a complicated healing cascade, in which conserving its transparency and integrity is critical. Accordingly, the hydrogels' known properties along with the stimulation of nerve and cell regeneration make them ideal scaffold for corneal tissue engineering. Hydrogels have been used extensively in clinical applications for the repair and replacement of diseased organs. The development and optimizing of novel hydrogels to repair/replace corneal injuries have been the main focus of researches within the last decade. This research aims to critically review in vitro, preclinical, as well as clinical trial studies related to corneal wound healing using hydrogels in the past 10 years, as this is considered as an emerging technology for corneal treatment. Several unique modifications of hydrogels with smart behaviors have undergone early phase clinical trials and showed promising outcomes. Financially, this considers a multibillion dollars industry and with huge interest from medical devices as well as pharmaceutical industries with several products may emerge within the next five years.
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Affiliation(s)
- Sadjad Khosravimelal
- Department of Medical Biotechnology, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, 1449614535, Iran
- Cellular and Molecular Research Centre, Iran University of Medical Sciences, Tehran, 1449614535, Iran
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, 1449614535, Iran
| | - Mohammadmahdi Mobaraki
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, 1591634311, Iran
| | - Samane Eftekhari
- Department of Medical Biotechnology, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, 1449614535, Iran
- Cellular and Molecular Research Centre, Iran University of Medical Sciences, Tehran, 1449614535, Iran
| | - Mark Ahearne
- Trinity Centre for Biomedical Engineering, School of Engineering, Trinity College Dublin, University of Dublin, Dublin, D02 R590, Republic of Ireland
| | - Alexander Marcus Seifalian
- Nanotechnology & Regenerative Medicine Commercialization Centre (NanoRegMed Ltd), London BioScience Innovation Centre, London, NW1 0NH, UK
| | - Mazaher Gholipourmalekabadi
- Cellular and Molecular Research Centre, Iran University of Medical Sciences, Tehran, 1449614535, Iran
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, 1449614535, Iran
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