[1
]
Department of Sport, Exercise and Health, Division of Sports and Exercise Medicine,
University of Basel, 4052 Basel, Switzerland.
[2
]
Swiss Tropical and Public Health Institute, Basel, Switzerland University of Basel,
Basel, Switzerland.
[3
]
Divison of Chronic Disease Epidemiology, Department of Epidemiology, Epidemiology,
Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland.
[4
]
Clinic of Pneumology and Respiratory Cell Research, University Hospital, Basel, Switzerland.
[5
]
Division of Pulmonary Medicine, Regional Hospital Lugano, Lugano, Switzerland.
[6
]
Zürcher Höhenklinik, Wald-Faltigberg, Faltigberg-Wald, Switzerland.
[7
]
Lungenpraxis Hirslanden Klinik Aarau, Aarau, Switzerland.