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Why changing the U.S. health care system is so difficult |
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| Affiliation: | 1. Dental Materials Research Center, Department of Pediatric Dentistry, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran;2. Neurogenic Inflammation Research Center, Mashhad University of Medical Sciences, Mashhad, IR, Iran;3. Natural Products and Medicinal Plants Research Center, North Khorasan University of Medical Sciences, Bojnurd, Iran;4. Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, IR, Iran |
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