Authors: Hans-Ulrich Wittchen; Sabine M Apelt; Gerhard Bühringer; Markus Gastpar; Markus Backmund; Jörg Gölz; Michael R Kraus; Felix Tretter; Jens Klotsche; Jens Siegert; David Pittrow; Michael Soyka Journal: Int J Methods Psychiatr Res Date: 2005 Impact factor: 4.035