title: Response from the authors.
authors.affiliation: Competence Center for Clinical Trials Bremen, University of Bremen, Bremen, Germany conschul@math.uni-bremen.de.
authors.forename: Constanze
authors.initials: C
authors.lastname: Schulz
authors.affiliation: Competence Center for Clinical Trials Bremen, University of Bremen, Bremen, Germany.
authors.forename: Jürgen
authors.initials: J
authors.lastname: Timm
authors.affiliation: Department of Psychiatry and Psychotherapy, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany.
authors.forename: Joachim
authors.initials: J
authors.lastname: Cordes
authors.affiliation: Department of Psychiatry, Psychotherapy and Psychosomatics, Medical Faculty, RWTH Aachen University, Aachen, Germany.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Gründer
authors.affiliation: Competence Center for Clinical Trials Bremen, University of Bremen, Bremen, Germany Department of Pharmacology, Klinikum Bremen-Mitte, Bremen, Germany.
authors.forename: Bernd
authors.initials: B
authors.lastname: Mühlbauer
authors.affiliation: Department of Psychiatry and Psychotherapy, University of Göttingen, Göttingen, Germany.
authors.forename: Eckart
authors.initials: E
authors.lastname: Rüther
authors.affiliation: Department for Psychiatry and Psychotherapy, Brandenburg Medical School, Immanuel Klinik Rüdersdorf, Rüdersdorf, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Heinze