Received: 20 January 2021
Accepted: 30 April 2021
First Online: 30 May 2021
: The Cantonal Ethics Commission of Zurich approved the reuse of routinely collected data for this study (no. 2015–0258). Patients gave their consent to the use of their data for such purposes. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare that they have no competing interests.