Q fever: 1976-7.
D000293:Adolescent; D000328:Adult; D004781:Environmental Exposure; D005260:Female; D006331:Heart Diseases / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000453:epidemiology; D011778:Q Fever / Q000150:complications / Q000453:epidemiology*; D012189:Retrospective Studies; D006113:United Kingdom