GSTM1 and ablepharon macrostomia syndrome: The changes that occurred during acclimatization and upon reascent in PaO2, PaCO2, SaO2, CaO2, P50, pH, and [Hb] were not related on an individual (all correlations r<0.5) or group basis (all comparisons p>0.1) to AMS, cognitive function, or exercise responses.