Altitude SicknessMountaineeringAltitudeExpeditionsAtmosphere Exposure ChambersAcetazolamideDecompressionAnoxiaNepalCarbonic Anhydrase InhibitorsAcute DiseaseAtmospheric PressureAcclimatizationPulmonary EdemaBlood Circulation TimeBrain EdemaMotion SicknessHypoventilationHeadacheGinkgo bilobaSwitzerlandOxygenPolycythemiaTibetDexamethasoneAdaptation, PhysiologicalRespirationOxygen ConsumptionSeverity of Illness IndexDouble-Blind MethodSerum SicknessSick LeaveCerebrovascular CirculationPlacebosDecompression SicknessExerciseDisease SusceptibilityAbsenteeismProspective StudiesTime FactorsPeruPulmonary Heart Disease