Institution: | Universitäts-Frauenklinik, Marburg, BRD, the Max-Planck-Institut für Arbeitsphysiologie, Dortmund, BRD, the Universitäts-Frauenklinik, Rostock, DDR, and the Research Department 1, E-blocket, and the Department of Obstetrics and Gynaecology, University Hospital, Lund, Sweden |