1. Department of Sport Science; Hermann Buhl Institute for Hypoxia and Sleep Medicine Research; University Innsbruck; Bad Aibling Germany
2. Division of Sports- and Rehabilitative Medicine; Department of Medicine; University Hospitals Ulm; Ulm Germany
3. Pulmonary and Critical Care Division; Department of Medicine; University Hospitals; Case Western Reserve University; Cleveland OH USA
4. Department of Human Genetics; University Hospitals Ulm; Ulm Germany
5. Department of Sport Science; University Innsbruck; Innsbruck Austria