Document Type : original article
Authors
1 Resident of Pediatrics, Department of Pediatrics, Faculty of Medicine. Birjand University of Medical Sciences, Birjand, South Khorasan Province, Iran.
2 Assistante professor of Social Medicine, Birjand University of Medical Sciences(BUMS
3 Resident of Pediatrics, Department of Pediatrics, Faculty of Medicine. Birjand University of Medical Sciences (BUMS), Birjand, South Khorasan Province, Iran
Abstract
Keywords