[1] Univ Bern, Bern Univ Hosp, Inselspital, Dept Pediat,Div Pediat Hematol & Oncol, Bern, Switzerland
[2] Univ Bern, Inst Social & Prevent Med, Bern, Switzerland
[3] Univ Zurich, Kinderspital Zurich, Pediat Oncol, Zurich, Switzerland
[4] Univ Bern, Bern Univ Hosp, Inselspital, Dept Pediat, Bern, Switzerland
[5] Univ Hosp Geneva, Dept Women Child & Adolescent, Pediat Hematol Oncol, Geneva, Switzerland
[6] Univ Geneva, Fac Med, Dept Pediat Gynecol & Obstet, Cansearch Res Platform Pediat Oncol & Hematol, Geneva, Switzerland
[7] Univ Basel, Univ Childrens Hosp Basel, Div Pediat Hematol & Oncol, Basel, Switzerland
[8] Kinderaerzte KurWerk, Burgdorf, Switzerland