Letter: The "oily" paper bag and hyperventilation.
D000208:Acute Disease; D002245:Carbon Dioxide; D006801:Humans; D006985:Hyperventilation / Q000628:therapy*; D008722:Methods; D010209:Paper; D011602:Psychophysiologic Disorders / Q000628:therapy; D012119:Respiration
D002245:Carbon Dioxide