Microgravity research: a new dimension in medical science.
D000222:Adaptation, Physiological; D006321:Heart / Q000502:physiology; D006439:Hemodynamics; D006801:Humans; D007668:Kidney / Q000502:physiology; D012107:Research Design; D012306:Risk; D013026:Space Flight; D014481:United States; D014893:Weightlessness