[1] German Sport Univ Cologne, Inst Hlth Promot & Clin Movement Sci, Dept Neurol Psychosomat Med & Psychiat, Sportpark Mungersdorf 6, D-50933 Cologne, Germany
[2] Univ Cologne, Dept Palliat Med, Fac Med, Cologne, Germany
[3] Univ Cologne, Univ Hosp Cologne, Cologne, Germany