[1] Columbia Univ, New York, NY USA
[2] Univ So Calif, Keck Sch Med, Los Angeles, CA 90033 USA
[3] Sheffield Childrens Hosp, Sheffield, S Yorkshire, England
[4] Med City Childrens Hosp, Dallas, TX USA
[5] Inst Gustave Roussy, Villejuif, France
[6] Royal Marsden Hosp, Sutton, Surrey, England
[7] Univ Paris 13, HU Avicenne, Bobigny, France
[8] Gloucestershire Hosp, NHS Fdn Trust, Gloucester, England
[9] Univ Utah, Hlth Sci Ctr, Salt Lake City, UT USA