1- Clinical Research Development Unit of, Bou-Ali Sina Hospital, Mazandaran University of Medical Sciences, Sari, IR Ira 2- Antimicrobial Resistant Nosocomial Infection Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, IR Iran; Department of Pediatrics, Bou-Ali Sina Hospital, Mazandaran University of Medical Sciences, Sari, IR Iran 3- Department of Education of Markazi Province, Education Organization of Markazi Province, Arak, IR Iran 4- Department of Pediatrics, Bou-Ali Sina Hospital, Mazandaran University of Medical Sciences, Sari, IR Iran