Received: 7 December 2020
Accepted: 6 September 2021
First Online: 27 September 2021
: The study protocol is available online via https://springerplus.springeropen.com/articles/ExternalRef removed and was approved by the ethics board of St. Gallen, Switzerland on May 6, 2015 (EKSG 14/145). The study is conducted in accordance with the ethical standards of the institutional review board, medical professional codex and the with the 1964 Helsinki declaration and its later amendments as of 1996 as well as Data Security Laws and good clinical practice guidelines. Study participation is voluntary and can be cancelled at any time without provision of reasons and without negative consequences. Informed consent was obtained from all individual participants included in the study considering the data collected, used and analyzed exclusively and only in the context of the NURMI Study.
: Not applicable.
: The authors declare that they have no competing interests.