Funding for this research was provided by:
Text and Data Mining valid from 2020-05-06
Received: 21 January 2020
Accepted: 23 April 2020
First Online: 6 May 2020
Ethics approval and consent to participate
: This study was carried out in accordance with the Declaration of Helsinki and the current guidelines of good clinical practice. The ethics committee of the Hannover Medical School approved the study (ID: 6428), and written informed consent was obtained from participants before their entry into the study.
: Not applicable.
: Authors declare that they have no competing interests.