Received: 1 May 2020
Accepted: 2 June 2020
First Online: 9 August 2020
Ethics approval and consent to participate
: The responsible Ethics Committee approved this retrospective study (Ethik-Kommission der Landesärztekammer Baden-Württemberg, Reference Nr. F-2018-110). A written informed consent was obtained from the patients or their legal representatives at least 24 h in advance in each case.
: Patients’ consents for the retrospective data analysis and anonymous publication were obtained in a written form in all cases. Patients were informed in writing about the application of the General Data Protection Regulation (GDPR).
: Marta Aguilar Pérez has proctoring and consultancy agreements with Kaneka, Medtronic and phenox; Victoria Hellstern has consultancy agreements with phenox; Hans Henkes is co-founder and shareholder of phenox; the other authors have declared that no competing interest exists.