[1] Johns Hopkins Univ, Sch Med, Dept Orthoped Surg, Baltimore, MD USA
[2] Helios Klinikum Berlin Buch, Dept Orthoped Oncol, Sarcoma Ctr Berlin Brandenburg, Berlin, Germany
[3] East Carolina Univ, Div Pediat Surg, Greenville, NC 27858 USA
[4] Princess Maxima Ctr Pediat Oncol, Pediat Solid Tumor Unit, Pediat Surg, Utrecht, Netherlands
[5] H Lee Moffitt Canc Ctr & Res Inst, Sarcoma Dept, Adolescent & Young Adult Program, Tampa, FL USA
[6] Marciniak Hosp, Dept Pediat Surg, Wroclaw, Poland
[7] Med Univ, Dept Pediat Traumatol & Emergency Med, Wroclaw, Poland
[8] Univ Padua, Dept Womens & Childrens Hlth, Pediat Surg Div, Padua, Italy
[9] Stanford Univ, Med Ctr, Dept Radiat Oncol, Stanford, CA 94305 USA
[10] Univ Washington, Div Hematol Oncol, Seattle Childrens Hosp, Fred Hutchinson Canc Res Ctr, Seattle, WA 98195 USA
[11] Olga Hosp, Klinikum Stuttgart, Zentrum Kinder, Jugendund Frauenmed,Pediat Pediat Oncol Hematol &, Stuttgart, Germany
[12] Padova Univ Hosp, Dept Womens & Childrens Hlth, Hematol & Oncol Div, Padua, Italy
[13] Univ Hosp Bristol NHS Fdn Trust, Dept Pediat Surg, Bristol, Avon, England