[1] Hosp St Joan de Deu, Pediat Canc Ctr Barcelona, Barcelona, Spain
[2] Queen Mary Hosp, Hong Kong, Peoples R China
[3] Univ Hong Kong, Hong Kong Childrens Hosp, Pokfulam, Hong Kong, Peoples R China
[4] Hosp Sick Children, Toronto, ON, Canada
[5] IRCCS Ist Giannina Gaslini, Genoa, Italy
[6] Copenhagen Univ Hosp, Rigshosp, Copenhagen, Denmark
[7] Johannes Gutenberg Univ Mainz, Univ Med Ctr, Ctr Pediat & Adolescent Med, Mainz, Germany
[8] Riley Hosp Children, Indianapolis, IN USA
[9] Hosp Infantil Univ Nino Jesus, Madrid, Spain
[10] Y mAbs AS, Horsholm, Denmark
[11] Mem Sloan Kettering Canc Ctr, 1275 York Ave, New York, NY 10021 USA