The role of recumbency in the prevention and treatment of postspinal headache.
D000775:Anesthesia, Spinal / Q000009:adverse effects*; D005500:Follow-Up Studies; D006261:Headache / Q000139:chemically induced / Q000453:epidemiology / Q000517:prevention & control / Q000628:therapy*; D006801:Humans; D008161:Lumbosacral Region; D011187:Posture; D013997:Time Factors