[1] Emory Univ, Atlanta, GA 30322 USA
[2] Cambridge Univ Hosp Natl Hlth Serv NHS Fdn Trust, Cambridge, England
[3] Boston Childrens Hosp, Boston, MA USA
[4] Dana Farber Canc Inst, Boston, MA 02115 USA
[5] Riley Hosp Sick Children, Indianapolis, IN USA
[6] Univ So Calif, Los Angeles, CA USA
[7] Univ Texas SW Med Ctr Dallas, Dallas, TX 75390 USA
[8] Childrens Med Ctr, Dallas, TX 75235 USA
[9] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA
[10] Royal Victoria Hosp, Belfast BT12 6BA, Antrim, North Ireland
[11] Birmingham Childrens Hosp NHS Fdn Trust, Birmingham, W Midlands, England
[12] Univ Coll London Hosp NHS Fdn Trust, London, England
[13] Yale Univ, Sch Med, New Haven, CT USA
[14] Univ Leeds, Leeds, W Yorkshire, England
[15] Hosp Sick Children, Toronto, ON M5G 1X8, Canada
[16] Univ Toronto, Toronto, ON, Canada
[17] Univ Chicago, Pritzker Sch Med, Chicago, IL 60637 USA
[18] MRC, London, England
[19] Mem Sloan Kettering Canc Ctr, New York, NY 10021 USA
[20] Sydney Canc Ctr, Sydney, NSW, Australia
[21] Inst Canc Res, Surrey, England
[22] Royal Marsden Hosp, Surrey, England
[23] Barts Canc Inst, London, England
[24] Barretos Pediat Canc Ctr, Sao Paulo, Brazil
[25] Ctr Infantil Boldrini, Campinas, SP, Brazil
[26] Tata Mem Hosp, Bombay 400012, Maharashtra, India
[27] Childrens Canc Hosp, Cairo, Egypt
[28] Royal Victoria Infirm NHS Fdn Trust, Newcastle Upon Tyne, Tyne & Wear, England