1. Department of Sport Science, University of Innsbruck, Innsbruck, Austria.
2. Austrian Society for Alpine- and High-Altitude Medicine, Innsbruck, Austria.
3. Translational Lung Research Center Heidelberg (TLRC), German Center for Lung Research (DZL), Heidelberg, Germany.
4. Department of Pediatric Oncology, Hematology, Immunology and Pulmonology, Centre for Translational Biomedical Iron Research, Molecular Medicine Partnership Unit (MMPU) Group Leader, University Hospital Heidelberg, Heidelberg, Germany.
5. German Centre for Cardiovascular Research (DZHK), Partner Site Heidelberg/Mannheim, Heidelberg, Germany.