title: Rationale of mask-mounted hypoxia warning systems.
mesh_terms: D000337:Aerospace Medicine; D002245:Carbon Dioxide / Q000032:analysis; D006801:Humans; D000860:Hypoxia / Q000175:diagnosis*; D008397:Masks; D008991:Monitoring, Physiologic; D010100:Oxygen / Q000032:analysis
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen