Funding for this research was provided by:
Publikationsfonds des Landes SH für Nachwuchswissenschaftlerinnen und -wissenschaftler der CAU (we did not receive any funding so far, but we will apply for funding)
Received: 24 February 2020
Accepted: 7 June 2020
First Online: 18 June 2020
Ethics approval and consent to participate
: This study was designed as retrospective observational study and approved by the Local Ethics Committee (Christian-Albrechts-University Kiel, Schwanenweg 20, D-24105 Kiel, Referral number: D 417/17). Written informed consent was obtained from all patients included into this study.
: Not applicable.
: The authors declare that they have no competing interests.