BRITISH MEDICAL RESEAR; DOFASCO; FINNISH OCCUPATIONAL D; HEALTH CARE FINANCING; HOMESTAKE VETERANS ASS; HRI, HEALTH RESEARCH INST,ROSWELL PARK; INTL ASSN OF HEAT + FR; NC STATE BOARD OF HEAL; NEUROLOGICAL INST C BE; OTTAWA CIVIC HOSP UROL; PNEUMOCONIOSIS MEDICAL; SEER; SWEDISH PNEUMOCONIOSIS; UNITED MINE WORKERS OF; US PUBLIC HEALTH SERVI; VT DIVISION OF INDUSTR; VT STATE BOARD OF HEAL; VT STATE HEALTH DEPT