[1] Humboldt Univ, Freie Univ Berlin, Berlin Inst Hlth, Dept Pediat,Div Oncol & Hematol,Charite Univ Med B, Berlin, Germany
[2] Witten Herdecke Univ, Fac Hlth, Integrated Curriculum Anthroposoph Med, Witten, Germany
[3] Univ Sao Paulo, Fac Med, Dept Pediat, Sao Paulo, Brazil