[1] Univ Lausanne Hosp, Dept Femme Mere Enfant, Maternofetal & Obstet Res Unit, Lausanne, Switzerland
[2] Univ Lausanne, Inst Microbiol, Fac Biol & Med, Lausanne, Switzerland
[3] Univ Lausanne Hosp, Lausanne, Switzerland
[4] Univ Hosp Leuven, Div Woman & Child, Dept Obstet & Gynecol, Leuven, Belgium
[5] Inst Louis Malarde, Unit Emerging Infect Dis, Tahiti, France
[6] Univ Lausanne Hosp, Dept Femme Mere Enfant, Clin Neonatol, Lausanne, Switzerland
[7] Univ Geneva, Sch Pharmaceut Sci, Geneva, Switzerland
[8] Univ Lausanne, Geneva, Switzerland
[9] Univ Lausanne Hosp, Swiss Teratogen Informat Serv, Lausanne, Switzerland
[10] Univ Lausanne Hosp, Div Clin Pharmacol, Lausanne, Switzerland
[11] Harvard Univ, Dept Epidemiol, TH Chan Sch Publ Hlth, Boston, MA 02115 USA