1. Swiss Tropical and Public Health Institute, Basel, Switzerland
2. University of Basel, Basel, Switzerland
3. Hôpital Intercantonal de la Broye, Payerne, Switzerland
4. Imagelabonline and Cardiovascular, Eindhoven and Lunteren, the Netherlands
5. Zürcher Höhenklinik Davos, Davos Clavadel, Switzerland
6. Division Sports and Exercise Medicine, Department of Sport, Exercise and Health, University of Basel, Basel, Switzerland
7. Department of Environmental & Occupational Health Sciences, University of Washington, Seattle, Washington, USA