Corresponding Author: Christian P. Müller

Section of Addiction Medicine, Department of Psychiatry and Psychotherapy, Friedrich-Alexander University Erlangen-Nürnberg, Schwabachanlage 6, Erlangen 91054 (Germany)
Tel. +49 (0) 9131 85 36896, Fax +49-(0)9131-85-36002, E-Mail Christian.Mueller@uk-erlangen.de