Pulmonary tuberculosis among NTUC comfort taxi drivers.
D000328:Adult; D000367:Age Factors; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009790:Occupations; D012846:Singapore; D014397:Tuberculosis, Pulmonary / Q000453:epidemiology* / Q000517:prevention & control