Chronic non-malignant pain: a population prevalence study.
D000328:Adult; D000368:Aged; D001416:Back Pain / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009437:Neuralgia / Q000453:epidemiology; D010146:Pain / Q000453:epidemiology*; D013997:Time Factors