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Article History

Received: 10 May 2021

Accepted: 8 October 2021

First Online: 4 November 2021

Declarations

:

: All procedures performed in studies involving human participants were conducted in accordance with the ethical standards of the Ethics Committee of the Medical Association of Berlin (Eth-12/16) and in accordance with the 1964 Helsinki Declaration and later amendments.

: Informed consent was obtained from all individual participants included in the study.

: N/A

: CB, NTS, SW, SD, and CK are employees of the two institutions in charge of the certification system. SJO reports personal fees from EUSA Pharma Inc. and medac GmbH outside the submitted work. FZ reports personal fees from Janssen Cilag GmbH, Bayer Vital GmbH, and Sanofi Aventis GmbH outside the submitted work. CK is treasurer of the German Society for Medical Sociology (unpaid) and member of the governing board of the European Public Health Association (unpaid). AT is board member of the Deutsche Vereinigung für Soziale Arbeit im Gesundheitswesen e. V. (unpaid). LA, EGC, GF, CS, AP, BB, AB, MB, FD, ME, AAG, CG, AH, BK, TK, FK, BP, VS, and IP declare no potential conflicts of interest.