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Arterial oxygen saturation (Sao2) versus pulmonary artery systemic pressure (PASP) plots in baseline and the first 3 days in high altitude. The slope of linear regression of Sao2 and PASP of the placebo group (dot line, y=175.80–1.57x) was not statistically different from the acetazolamide group (thick solid line, y=114.68–0.94x, p>0.05) or the ginkgo biloba group (thin solid line, y=111.82–0.90x, p>0.05).
