[1] Charite Univ Med Berlin, Charite CCM & CBF, Inst Social Med Epidemiol & Hlth Econ, Berlin, Germany
[2] Charite Univ Med Berlin, Charite CCM & CBF, Dept Gastroenterol Infectiol & Rheumatol, Berlin, Germany
[3] Univ Med Mannheim, Interdisciplinary Tumour Ctr Mannheim, Mannheim, Germany
[4] Emek Med Ctr, Afula, Israel
[5] Univ Belgrade, Belgrade & Med Sch, Clin Ctr Serbia, Belgrade, Serbia
[6] Univ Witten Herdecke, Fac Hlth, Dept Human Med, Gerhard Kienle Chair Med Theory Integrat & Anthro, Witten, Germany
[7] Univ Freiburg, Inst Infect Prevent & Hosp Epidemiol, Ctr Complementary Med, Freiburg, Germany
[8] Klinikum Bruderwald, Social Fdn Bamberg, Clin Integrat Med & Naturopathy, Bamberg, Germany
[9] Univ Witten Herdecke, Inst Integrat Med, Witten, Germany
[10] Hosp Havelhohe, Dept Oncol, Berlin, Germany