[1] Gemeinschaftskrankenhaus, Ctr Integrat Pediat Oncol, Herdecke, Germany
[2] Univ Marburg, Fac Med, Marburg, Germany
[3] Gemeinschaftskrankenhaus, Herecke, Germany
[4] Charite, Otto Heubner Ctr Paediat & Adolescent Med, D-13353 Berlin, Germany
[5] Univ Witten Herdecke, Ctr Integrat Med, Fac Hlth, Herdecke, Germany