Received: 24 March 2019
Accepted: 9 October 2019
First Online: 27 October 2019
Ethics approval and consent to participate
: Written informed consent was obtained from all individual participants to be included in the study. The ethics committee approval was obtained (Ref no: 2016-55 N-MA).Ethics Committee:Medicine Faculty Mannheim,Medical ethics committee IIProf Dr. Med Jens P StribelCentre for medical researchHouse 42, Building 3Mannheim Medical University, Theodore –Kutzer-Ufer 1–3Mannheim, Germany-68,167
: Not applicable
: The authors declare that they have no competing interests.