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1Inpatient Safety Research Center, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
2Department of Biostatistics and Epidemiology, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
3Reproductive Health Research Center, Urmia University of Medical Sciences, Urmia, Iran
4Department of Public Health, Faculty of Medicine, Tabriz Branch, Islamic Azad University, Tabriz, Iran
5Department of Respiratory Medicine, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
6Department of Pediatrics, Motahari Hospital, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
7Department of Pediatrics, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
Copyright © 2014, Korean Society of Epidemiology
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