Brezina, T.
von Dewitz, H.
Schroeder, T.
Ullrich, S.
Nachtkamp, K.
Reifenberger, G.
Malzkorn, B.
Sabel, M.
Haas, R.
Kobbe, G.
Article History
Received: 27 June 2021
Accepted: 14 December 2021
First Online: 4 January 2022
Declarations
:
: The study was entirely based on register data and was approved by the ethical committee of Heinrich Heine University Duesseldorf.
: Not applicable.
: Not applicable.
: The authors declare no competing interests.