Department of Obstetrics and Gynecology, Riga Stradins University, Riga, Latvia
Dace Rezeberga
Department of Obstetrics and Gynecology, Riga Stradins University, Riga, Latvia
Uldis Teibe
Department of Biostatistics, Riga Stradins University, Riga, Latvia
Gilbert Donders
Department of Obstetrics and Gynecology of the Regional Hospital Heilig Hart Tienen, University Hospital Gasthuisberg Leuven, University Hospital Citadelle, Liège, Belgium