[1] Vrije Univ Amsterdam, Med Ctr, Dept Pulmonol, Amsterdam, Netherlands
[2] Univ Catania, Dept Cardiol, Catania, Italy
[3] Onze Lieve Vrouw Hosp, Dept Resp Med, Amsterdam, Netherlands
[4] Univ Naples 2, Monaldi Hosp, Dept Cardiol, Naples, Italy
[5] Univ Peruana Cayetano Heredia, Dept Med, Lima, Peru
[6] Univ Peruana Cayetano Heredia, High Altitude Res Inst, Lima, Peru
[7] Univ Libre Brussels, Fac Med, Dept Pathophysiol, B-1070 Brussels, Belgium
[8] Univ Hosp Bordeaux, Dept Physiol, Bordeaux, France
[9] Univ Poitiers, Lab Physiol Adaptat Phys Act, Poitiers, France
[10] St Elizabeth Hosp, Dept Pneumol, Namur, Belgium