Search results
BMC Pregnancy and Childbirth > 2019 > 19 > 1 > 1-14
BMC Pregnancy and Childbirth > 2019 > 19 > 1 > 1-11
Maternal and Child Health Journal > 2014 > 18 > 1 > 1-9
European Journal of Epidemiology > 2006 > 21 > 10 > 787-788
BMC Pregnancy and Childbirth > 2019 > 19 > 1 > 1-14
BMC Pregnancy and Childbirth > 2019 > 19 > 1 > 1-11
Maternal and Child Health Journal > 2014 > 18 > 1 > 1-9
European Journal of Epidemiology > 2006 > 21 > 10 > 787-788