[1] Sophia Childrens Univ Hosp, Erasmus Med Ctr, Wytemaweg 80, NL-3015 CN Rotterdam, Netherlands
[2] Univ Med Ctr Utrecht, Wilhelmina Childrens Hosp, Utrecht, Netherlands
[3] Matthews Friends Clin, Lingfield, England
[4] Univ Essen Gesamthsch, Childrens Hosp, Duisburg, Germany
[5] Great Ormond St Hosp Sick Children, London, England
[6] Med Univ South Carolina, Charleston, SC 29425 USA
[7] Childrens Mercy Hosp & Clin, Overland Pk, KS USA
[8] Univ Modena & Reggio Emilia, Modena Mo, Italy
[9] Ctr Pediat & Oncol, Chorzow, Poland
[10] Med Univ Vienna, Vienna, Austria
[11] Klinikum Aschaffenburg Alzenau, Aschaffenburg, Germany
[12] Pediat Epilepsy & Child Neurol Paris Diderot Univ, Paris, France
[13] Great Ormond St Hosp Sick Children, UCL Inst Child Hlth, London, England