[1] Univ Zaragoza, EU Ciencias Salud, E-50009 Zaragoza, Spain
[2] Univ Milan, Fdn IRCCS Ca Granda Osped Maggiore Policlin, Dept Maternal & Pediat Sci, Milan, Italy
[3] Univ Childrens Hosp, Zurich, Switzerland
[4] Univ Pecs, Dept Pediat, Pecs, Hungary
[5] Univ Childrens Hosp Zagreb, Univ Hosp Sister Mercy, Zagreb, Croatia
[6] Univ Munich Med Ctr, Dr von Hauner Childrens Hosp, Munich, Germany
[7] Deaconry Hosp, Dept Paediat, Munich, Germany
[8] Leeds Gen Infirm, Leeds, W Yorkshire, England
[9] Tel Aviv Univ, Sackler Fac Med, Schneider Childrens Med Ctr Israel, IL-69978 Tel Aviv, Israel
[10] Med Univ Warsaw, Warsaw, Poland
[11] Univ Lille, Fac Med, Jeanne de Flandre Childrens Hosp, Lille, France
[12] Vrije Univ Amsterdam, Med Ctr, Amsterdam, Netherlands