Received: 2 September 2021
Accepted: 6 December 2021
First Online: 10 January 2022
: The Ethics Board of the Canton of Zurich reviewed the study protocol and formally waved the necessity for a full ethics review based on the Swiss Law on Research on Humans [BASEC-Nr. Req-2020-00974].
: Not applicable.
: RNG declares a financial interest as a shareholder of Haelixa AG, Kemptthal, Switzerland. IP on DNA encapsulated into silica nanoparticles is licensed to Haelixa AG. All other authors have no conflicts of interest. HS reports a travel grant and speaker’s honorary from AstraZeneca in 2020 and speaker honorary from agfam (non-profit) and Livinguard AG in 2021 not related to this work.