Article History
Received: 1 March 2020
Accepted: 22 July 2020
First Online: 18 August 2020
Ethics approval and consent to participate
: All data was collected from patients who gave their informed consent themselves or through legal representatives. The study was approved by the data protection officer of the Canton of Zurich and classified and approved by the Ethics Committee of Zurich as not requiring approval (ID: Req-2018-00597).
: Not applicable.
: The authors declare that they have no competing interests.