[1] Univ Hosp Erlangen, Dept Psychosomat Med & Psychotherapy, Erlangen, Germany
[2] Univ Marburg, Dept Psychol Clin Psychol & Psychol Therapy, Marburg, Germany
[3] Ruhr Univ Bochum, Dept Psychosomat Med & Psychotherapy, Bochum, Germany
[4] Univ Tubingen Hosp, Dept Psychosomat Med & Psychotherapy, Tubingen, Germany
[5] Univ Hosp Mainz, Dept Psychosomat Med & Psychotherapy, Mainz, Germany
[6] Univ Erlangen Nurnberg, Dept Med Informat Biometry & Epidemiol, Erlangen, Germany