Funding for this research was provided by:
Received: 5 October 2020
Accepted: 9 February 2021
First Online: 18 February 2021
Ethics approval and consent to participate
: All data that were screened and analysed for this study were collected from public Facebook® accounts that were accessible for anyone. Nevertheless, all health insurance providers included in the study received written information about the study process and gave informed consent. According to a consultation with the ethics committee of the University of Regensburg (August 12, 2015), the need for a formal ethical approval was waived, given the fact that we used only public websites, and did not include personal data relating to single individuals (reference no. 14-160-0162).
: All health insurance providers included in the study received written information about the study process and gave informed consent. 14/17 health insurance companies additionally agreed that screenshots or pictures of their Facebook® sites could be shown in publications as figures in an anonymized form; quotes from those companies that gave no consent are not included in this article.
: All authors declare that they have no competing interests.