Received: 16 April 2020
Accepted: 28 October 2020
First Online: 13 November 2020
Ethics approval and consent to participate
: This secondary data analysis was approved by the institutional review board of the Mannheim Medical Faculty, University of Heidelberg (amendment to IRB Nr. 2007-079E-MA, date 15.11.2011).
: not applicable.
: JEF holds shares in HealthVision GmbH, which provided back-office services and consulting for the automotive manufacturing company from 2009 to 2019. He acts as chief scientific consultant for HealthVision GmbH.