[1] Univ Med Ctr Freiburg, Dept Pediat & Adolescent Med, Div Pediat Hematol & Oncol, D-79106 Freiburg, Germany
[2] Univ Freiburg, Dept Psychol Rehabil Psychol & Psychotherapy, D-79106 Freiburg, Germany
[3] Univ Med Ctr Freiburg, Dept Internal Med 2, Div Endocrinol & Diabetol, D-79106 Freiburg, Germany