Received: 21 December 2018
Accepted: 20 May 2019
First Online: 28 May 2019
Ethics approval and consent to participate
: The retrospective analysis of routine data gathered during the voluntary check-ups was approved by the ethical committee of the Medical Association of the German State of Rhineland-Palatinate.
: Not applicable.
: Authors MC, MS, SW, DS are employees of BASF SE. MS, SW, DS hold stocks of BASF SE. The authors declare that there are no other competing interests.