[Smoking habits among employees in firms with a health service].
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D004522:Educational Status; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009664:Norway; D009787:Occupational Medicine; D012424:Rural Population; D012737:Sex Factors; D012907:Smoking / Q000453:epidemiology*; D014505:Urban Population
Røkevanene hos ansatte i bedrifter med bedriftshelsetjeneste.