Received: 21 January 2021
Accepted: 9 May 2021
First Online: 14 September 2021
: The ethical committee in Zentralklinik Bad Berka decided that we did not need an ethics approval for this study, because our analysis looked retrospectively at outcomes for a cohort of patients treated as part of routine care and is in no way an add-on for purposes of research.
: Not applicable, as this study was conducted retrospectively and was done internally as part of an audit/evaluation, to improve our quality of care. This is in line with the European regulations; ExternalRef removed=.
: The authors have no conflicts of interest to declare.