Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (01GI0601)
Deutsches Zentrum für Herz-Kreislaufforschung (81X2800112)
Received: 1 April 2019
Accepted: 20 November 2019
First Online: 30 November 2019
Compliance with ethical standards
: None declared.
: Prior written informed consent was obtained from all patients or from the parents or legal guardians of patients under legal age.
: Ethics committee of the <i>Ärztekammer des Saarlandes</i> (State Chamber of Physicians of the German federal state of Saarland, approval no. 07/18).