Griesshammer, Ellen
Adam, Henning
Sibert, Nora Tabea
Wesselmann, Simone
Article History
Received: 8 July 2019
Accepted: 9 March 2020
First Online: 6 April 2020
Compliance with ethical standards
:
: EG, HA, NTS, and SW are employees of the institution in charge of the certification system.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (include name of committee + reference number) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study protocol was approved by the ethics committee of the Medical Association of Berlin (Eth-12/16).
: Informed consent was obtained from all individual participants included in the study.