[1] Midwifery Acad Amsterdam, Vlaardingenlaan 1, NL-1059 GL Amsterdam, Netherlands
[2] Univ Amsterdam, Med Ctr, Dept Midwifery Sci, Locat VUmc, Amsterdam, Netherlands
[3] Amsterdam Publ Hlth, Qual Care, Amsterdam, Netherlands
[4] Univ Groningen, Univ Med Ctr Groningen, Dept Primary & Long Term Care, Groningen, Netherlands
[5] Spaarne Gasthuis, Haarlem, Netherlands
[6] Rotterdam Univ Appl Sci, Res Ctr Innovat Care, Rotterdam, Netherlands
[7] Zuyd Univ, Res Ctr Midwifery Sci, Maastricht, Netherlands
[8] Maastricht Univ, Care & Publ Hlth Res Inst, Maastricht, Netherlands
[9] Amsterdam Reprod & Dev, Amsterdam, Netherlands
[10] Univ Nottingham, Sch Hlth Sci, Div Midwifery, Nottingham, England
[11] Maxima Med Ctr, Dept Obstet & Gynaecol, Veldhoven, Netherlands