Funding for this research was provided by:
Erich und Gertrud Roggenbuck-Stiftung (-)
Werner Otto Stiftung (-)
Text and Data Mining valid from 2019-09-03
Received: 21 January 2019
Accepted: 9 August 2019
First Online: 3 September 2019
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the Medical Board Hamburg reference number PV3779. All participants gave their written consent for publication. All authors have agreed with the submission in its present form. There are no competing financial or other interests in relation to the work described.
: Not applicable.
: The authors declare that they have no competing interests.