Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (BMBF FKZ 01EO1401)
Received: 8 August 2017
Accepted: 25 January 2018
First Online: 8 February 2018
Change Date: 15 June 2018
Change Type: Correction
Change Details: After publication of the original article  it was brought to the authors’ attention that a sentence was missing in the acknowledgement section. The full acknowledgement is included in this Correction article:
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the LMU Munich Medical Faculty. Informed verbal consent was obtained prior to conducting the interview from all participants.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.