AMERICAN CANCER SOCIETY; BRITISH REGISTRAR GENERAL; BUREAU OF MORTALITY STATISTICS DC; MA DEPT OF PUBLIC HEALTH; MA DEPT OF PUBLIC WELFARE; MIT; NCI, NATL CANCER INST; NIH, NATL INST OF HEALTH; OLIVER BOYD; STATE CANCER HOSPITAL MA; TIRC, TOBACCO INDUSTRY RESEARCH COMM; UNIV OF BRISTOL; US PUBLIC HEALTH SERVICE