title: Introduction and overview of the problem.
authors.affiliation: Office of Space Flight, NASA HQ, Washington, DC 20546, USA.
authors.forename: K
authors.initials: K
authors.lastname: Hudkins
mesh_terms: D000337:Aerospace Medicine; D001274:Atmospheric Pressure; D003665:Decompression Sickness / Q000209:etiology / Q000517:prevention & control; D018478:Extravehicular Activity; D006801:Humans; D013026:Space Flight / Q000295:instrumentation*; D019442:Space Suits; D018531:Spacecraft; D014893:Weightlessness