Janka Koschack* , Martin Scherer* , Claus Lüers , Michael M Kochen , Dirk Wetzel , Sibylle Kleta , Claudia Pouwels , Rolf Wachter , Christoph Herrmann-Lingen , Burkert Pieske and Lutz Binder
BMC Family Practice 2008, 9:14doi:10.1186/1471-2296-9-14