Control of smoking in occupational epidemiologic studies: methods and needs.
Blair
A
A
Occupational Studies Section, National Cancer Institute, Bethesda, MD 20892.
Steenland
K
K
Shy
C
C
O'Berg
M
M
Halperin
W
W
Thomas
T
T
D004812:Epidemiologic Methods; D006801:Humans; D009784:Occupational Diseases / Q000209:etiology*; D012307:Risk Factors; D012907:Smoking / Q000453:epidemiology*