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Microcirculation in steady flight and acute weightlessness. Comparison of obtained parameters for normal gravity (1 G) and microgravity (0 G) for two variables of sublingual microcirculation, namely, the perfused proportion of vessels [(A) in the supine posture and (B) in the seated posture] and the total vessel density [(C) in the supine posture and (D) in the seated posture]. The test applied in statistical analysis was the Mann–Whitney test. ns, not significant.
