[1] Univ Heidelberg Hosp, Dept Gen Internal Med & Psychosomat, D-69126 Heidelberg, Germany
[2] Kings Coll London, Inst Psychiat Psychol & Neurosci, Sect Eating Disorders, London, England
[3] Univ Duisburg Essen, Dept Psychosomat Med & Psychotherapy, LVR Klin, Essen, Germany