Received: 4 December 2019
Accepted: 13 March 2020
First Online: 30 March 2020
Ethics approval and consent to participate
: In Germany, the use of claims data for scientific research is regulated by the Code of Social Law (SGB X). An ethical approval and informed consent are not required as this study used routinely collected anonymized data.
: Not applicable.
: The authors declare that they have no competing interests.