title: [Back pain. An epidemiological study].
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D001416:Back Pain / Q000453:epidemiology* / Q000209:etiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009664:Norway; D009784:Occupational Diseases / Q000453:epidemiology; D012737:Sex Factors
vernacular_title: Rygglidelser. En spidemiologisk undersøkelse.