Funding for this research was provided by:
Medizinische Hochschule Hannover (MHH)
Received: 25 November 2020
Accepted: 5 May 2021
First Online: 2 June 2021
: The retrospective data collection was approved by the Ethics Committee of Hannover Medical School.
: Not applicable.
: The authors have neither disclosures nor any competing interests.