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1School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2Department of Internal Medicine, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3Department of Biostatistics, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4Department of Epidemiology, School of Public Health and Safety, Environmental and Occupational Hazards Control Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
©2018, Korean Society of Epidemiology
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