Received: 18 October 2020
Accepted: 8 February 2021
First Online: 25 February 2021
Change Date: 7 April 2021
Change Type: Update
Change Details: OA Funding note added.
Ethics approval and consent to participate
: The study was performed in accordance with the latest revision of the Helsinki Declaration and received approval by the Ethics Committee of the Medical Faculty Mannheim (reference no. 2016-580N-MA). Written informed consent was obtained from all participants.
: Not applicable.
: Dr. Schaarschmidt received financial support for participation in conferences from ALK-Abello. Prof. Schmieder received financial support for participation in conferences from MEDA. Mrs. Schoeben, Mrs. Mohr and Mrs. Bubak have no competing interests to declare.