Biza A, Jille-Traas I, Colomar M, Belizan M, Requejo Harris J, Crahay B, Merialdi M, Nguyen MH, Althabe F, Aleman A, Bergel E, Carbonell A, Chavane L, Delvaux T, Geelhoed D, Gülmezoglu M, Malapende CR, Melo A, Osman NB, Widmer M, Temmerman M, Betrán AP. BMC Pregnancy Childbirth. 2015 Sep 2;15:200. doi: 10.1186/s12884-015-0625-x.
