ONTARIO STUDIES ON TUBERCULIN SENSITIVITY.
D002170:Canada; D006801:Humans; D007198:Indians, North American; D009164:Mycobacterium Infections; D009790:Occupations; D009864:Ontario; D013223:Statistics as Topic; D014373:Tuberculin; D014374:Tuberculin Test; D014481:United States; D044465:White People
D014373:Tuberculin
CANADA; CAUCASIAN RACE; INDIANS, NORTH AMERICAN; MYCOBACTERIUM INFECTIONS; OCCUPATIONS; STATISTICS; TUBERCULIN TEST