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Article History

Received: 7 September 2018

Accepted: 5 December 2018

First Online: 20 December 2018

Ethics approval and consent to participate

: Both surveys DEGS1-MH and GHS-MHS were conducted following the Federal and State Commissioners for Data Protection guidelines and the ethical principles of the Helsinki Declaration. DEGS1 and DEGS1-MH were approved by local ethics committees (Charité-Universitätsmedizin Berlin: No. EA2/047/08; Technische Universität Dresden: No. EK174062009). All participants provided written informed consent prior to participation.

: Not applicable.

: In the past 3 years, TK has received honoraria for providing methodological advice to Lilly, for a presentation on neuroepidemiology from Novartis, from providing a presentation about clinical research methods from Daiichi-Sankyo, and for providing editorial services from the BMJ. TK has provided methodological advice to CoLucid and Amgen, for which the Charité – Universitätsmedizin Berlin has received unrestricted funds. The remaining authors declare that they have no competing interests.

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