1. Department of Midwifery, School of Nursing and Midwifery, Shiraz University of Medical Sciences, Shiraz 7193613119, Iran
2. Dezful Health Center, Dezful University of Medical Science, Dezful 7461715765, Iran
3. Faculty of Medicine, Shiraz University of Medical Sciences, Shiraz 713451978, Iran
4. Department of Statistics, Health Faculty, Shiraz University of Medical Sciences, Shiraz 713451978, Iran
5. Clinical Trials Department, Barij Essence Company, P.O. Box 1178, Kashan, Iran