Funding for this research was provided by:
Medical University of Vienna
Article History
Received: 16 June 2020
Accepted: 24 December 2020
First Online: 1 February 2021
Compliance with ethical guidelines
:
: A. Nagel, A. Łaszewska, G. Haidinger and J. Simon declare that they have no competing interests.
: The article used publicly available administrative data; ethics approval was not required for the study.