No abstract available
Publication types
-
Multicenter Study
-
Research Support, U.S. Gov't, P.H.S.
MeSH terms
-
Aged
-
Anticarcinogenic Agents / therapeutic use*
-
Asbestos / adverse effects*
-
Cocarcinogenesis*
-
Female
-
Humans
-
Lung Neoplasms / etiology
-
Lung Neoplasms / prevention & control*
-
Male
-
Middle Aged
-
Occupational Diseases / etiology
-
Occupational Diseases / prevention & control*
-
Occupational Exposure*
-
Randomized Controlled Trials as Topic
-
Risk Factors
-
Smoking / adverse effects*
-
Vitamin A / therapeutic use*
-
beta Carotene / therapeutic use*
Substances
-
Anticarcinogenic Agents
-
beta Carotene
-
Vitamin A
-
Asbestos