[1] Univ Tehran Med Sci, Nursing & Midwifery Care Res Ctr, Sch Nursing & Midwifery, Tehran, Iran
[2] Kurdistan Univ Med Sci, Fac Hlth, Dept Publ Hlth, Sanandaj, Iran
[3] Minist Hlth & Med Educ, Midwifery Dept, Tehran, Iran
[4] Zurich Univ Appl Sci, Res Inst Midwifery & Reprod Hlth, Winterthur, Switzerland
[5] Univ Hosp Schleswig Holstein, Sch Gynaecol Endoscopy, Arnold Heller Str 3,Haus 24,Campus Kiel, D-24105 Kiel, Germany