作者单位:Glynd?r University and Betsi Cadwaladr University Health Board, North Wales, Wrexham Academic Unit[1]Dept. of Psychiatry and Psychotherapy III, University of Ulm, Leimgrubenweg 12, 89075 Ulm, Germany[2]Dept. of Nuclear Medicine, University of Ulm, Albert-Einstein-Allee 23, 89081 Ulm, Germany[3]Dept. of Psychiatry, General Hospital-Bruneck, Spitalstrasse 4, 39031 Bruneck, Italy[4]