*Institute of Sports and Preventive Medicine, Saarland University, Saarbrücken, Germany;

†Department of Cardiology and Angiology II, University Heart Center Freiburg-Bad Krozingen, Faculty of Medicine, University of Freiburg, Germany;

‡Sportmedizin München, Munich, Germany; and

§Department of Medical Microbiology and Hygiene, Saarland University, Faculty of Medicine and Medical Center, Homburg/Saar, Germany.

Corresponding Author: Philipp Breitbart, MD, Department of Cardiology and Angiology II, University Heart Center Freiburg-Bad Krozingen, Südring 15, Bad Krozingen 79189, Germany ([email protected]).

Supported by the Deutsche Fußball Liga (DFL).

The authors report no conflicts of interest.

T. Meyer and B. C. Gärtner contributed equally.