[1] Med Univ Vienna, Dept Obstet & Feto Maternal Med, A-1090 Vienna, Austria
[2] Univ Vienna, Dept Blood Grp Serol & Transfus Med, A-1090 Vienna, Austria
[3] Univ Amsterdam, Acad Med Ctr, Dept Gastroenterol & Hepatol, NL-1105 AZ Amsterdam, Netherlands
[4] Fundacao Oswaldo Cruz, Inst Fernandes Figueira, Transfus Dept, BR-22250020 Rio De Janeiro, Brazil
[5] Fundacao Oswaldo Cruz, Inst Fernandes Figueira, Dept Obstet, Fetal Med Sector, BR-22250020 Rio De Janeiro, Brazil
[6] Hosp Sirio Libanes, Blood Bank, BR-01308050 Sao Paulo, Brazil
[7] Charles Univ Prague, Dept Obstet & Gynaecol, Fac Med 1, Prague 12851 2, Czech Republic
[8] Gen Teaching Hosp, Prague 12851 2, Czech Republic
[9] Odense Univ Hosp, Dept Clin Immunol, DK-5000 Odense C, Denmark
[10] Copenhagen Univ Hosp, Blood Bank, Dept Clin Immunol, DK-2100 Copenhagen, Denmark
[11] Univ Helsinki, Cent Hosp, Dept Obstet & Gynecol, Huch 00029, Finland
[12] Finnish Red Cross Blood Serv, Helsinki 00310, Finland
[13] Univ Gottingen, Univ Med Ctr Gottingen, Dept Transfus Med, D-37099 Gottingen, Germany
[14] Univ Med Ctr, Dept Obstet & Gynaecol, Gottingen, Germany
[15] Fdn IRCCS Ca Granda Osped Maggiore Policlin, Ctr Trasfus & Immunoematol, I-20122 Milan, Italy
[16] Fdn IRCCS Ca Granda Osped Maggiore Policlin, Dipartimento Ostetricia Ginecol & Neonatol, I-20122 Milan, Italy
[17] Leiden Univ, Med Ctr, Dept Obstet, NL-2300 RC Leiden, Netherlands
[18] Leiden Univ, Med Ctr, Dept Immunohematol, NL-2300 RC Leiden, Netherlands
[19] Sanquin Diagnost Serv, NL-1066 CX Amsterdam, Netherlands
[20] New Zealand Blood Serv, Auckland, New Zealand
[21] Auckland Dist Hlth Board, Dept Obstet & Gynaecol, Auckland, New Zealand
[22] Haukeland Hosp, Dept Obstet & Gynecol, Div Obstet, N-5021 Bergen, Norway
[23] Haukeland Hosp, Dept Obstet & Gynecol, Fetal Med Unit, N-5021 Bergen, Norway
[24] Haukeland Hosp, Blood Bank, N-5021 Bergen, Norway
[25] Asker & Baerum Hosp, Lab Ctr, N-1309 Rud, Baerum, Norway
[26] Inst Hematol & Blood Transfus, PL-00957 Warsaw, Poland
[27] Univ Basel, Womens Hosp, Dept Biomed, Basel, Switzerland
[28] Univ Med Ctr Freiburg, Freiburg, Germany