[1] Santa Maria Misericordia Univ Hosp, Dept Ob Gyn, I-06132 Perugia, Italy
[2] Santa Maria Misericordia Univ Hosp, Ctr Pernatal & Reprod Med, I-06132 Perugia, Italy
[3] Univ Hosp Liege, Natl Reference Ctr Grp Streptococcus B, Deptt Clin Microbiol, Liege, Belgium
[4] Policlin Univ Hosp Modena, Neonatal Intens Care Unit, Modena, Italy
[5] Karolinska Inst, European Soc Neonatol, Stockholm, Sweden
[6] Univ Hosp, European Soc Neonatol, Stockholm, Sweden
[7] Hosp Clin Barcelona, Neonatol Serv, Barcelona, Spain
[8] Univ Florence, Meyer Childrens Hosp, Dept Fetal Neonatal Med, Florence, Italy
[9] Umea Univ Hosp, Neonatal Serv, Dept Pediat, Umea, Sweden
[10] Tel Aviv Univ, Sackler Fac Med, Rabin Med Ctr, Div Maternal Fetal Med,Helen Schneider Hosp, IL-69978 Tel Aviv, Israel
[11] NHS Lothian, Dept Obstet & Neonatol, Edinburgh, Midlothian, Scotland
[12] Mother & Child Med Grp, Moscow, Russia
[13] Univ Paris 05, Ctr Natl Reference Streptocoques, Grp Hosp Cochin, Serv Bacteriol, Paris, France
[14] Bar Ilan Univ, Neonatol Ziv Med Ctr, IL-52100 Ramat Gan, Israel
[15] Oslo Univ Hosp, Rikshosp, Div Women & Children, Inst Clin Med, Oslo, Norway
[16] Med Univ Warsaw, Dept Obstet & Gynecol 1, Warsaw, Poland
[17] Hop Paris St Joseph, Unite Microbiol Clin & Dosages Antiinfectieux, Paris, France