Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (01EL1422A)
Received: 11 March 2020
Accepted: 17 May 2020
First Online: 11 June 2020
Ethics approval and consent to participate
: Ethical approval for the PROMOTE study was obtained from the Ethics Committee of the Chemnitz University of Technology (TU Chemnitz), Faculty of Human and Social Sciences (V-099-17-HS-CVR-PROMOTE-03072015). All study participants gave their written consent to participate in the study. The PROMOTE study was retrospectively registered at the German Registry of Clinical Trials (DRKS00010052). The RTC interview study was approved by the Ethics Committee of the University of Bremen. All participants provided their written consent to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.