Epidemiologic Reports, Surveys
Woiski, M.D.; Scheepers, H.C.; Liefers, J.; Lance, M.; Middeldorp, J.M.; Lotgering, F.K.; Grol, R.P.; Hermens, R.P.
Department of Obstetrics and Gynecology, Radboud University Medical Center, Nijmegen, The Netherlands
doi: 10.1097/01.aoa.0000489456.90123.5e