1. Department of Midwifery, School of Nursing and Midwifery, Birjand University of Medical Sciences, Birjand, Iran
2. School of Nursing and Midwifery, Shahroud University of Medical Sciences, Shahroud, Iran
3. Proteomics Research Center and Department of Biostatistics, Faculty of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4. Clinical Research Development Unit, Imam Hossein Hospital, Shahroud University of Medical Science, Shahroud, Iran
5. Medical School, Arak University of Medical Sciences, Arak, Iran
6. Department of Midwifery, Faculty of Nursing and Midwifery, Islamic Azad University, Larestan Branch, Larestan, Iran