by Westgren, Magnus, Ek, Sverker, Bui, TheHung, Jansson, Berit, Kjaeldgaard, Anders, Markling, Lola, Nennesmo, Inger, Seiger e, Åke, Sarby, Bertil, Thornström, Stig, Ringden c, Olle
Published in American journal of obstetrics and gynecology (01.01.1997)