1. Department of Neonatology, Akbar Abadi Hospital, Iran University of Medical Sciences, (IUMS), Tehran, Iran
2. Department of Neonatology, Ali Asghar Hospital, Iran University of Medical Sciences, (IUMS), Tehran, Iran
3. School of Nursing and Midwifery, Iran University of Medical Sciences, (IUMS), Tehran, Iran
4. Student Research Committee, Epidemiology Department, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
5. Endometriosis Research Center, Iran University of Medical Sciences (IUMS), Tehran, Iran