[1] Hop Pourtales, Dept Pediat, Neuchatel, Switzerland
[2] ADMed Microbiol, La Chaux De Fonds, Switzerland
[3] Univ Hosp, Pediat Infectiol, Lausanne, Switzerland
[4] Univ Lausanne, Lausanne, Switzerland
[5] Hop Valais, Dept Pediat, Sion, Switzerland
[6] Univ Hosp, Clin Neonatol, Lausanne, Switzerland