Document xj06gGKy519Oyk0bpne0qeYX6

indings ledonald study <a irt study to dote, support its tisofa chrysolitemining 36,134(1): 125*127. mmg towns, where levels meriam cities. In spite of 2 wasfound corkers manufacturing lustrial Medicine, 1989, from lung cancer, other istos cement workers; of Industrial Medicine, hplantusing chrysot&e '0-20f/ml. M.. furtherfollow-up ty. British Journal of rotary using chrysohle excesses, the causes of ung pleura andgas- j e andfibre type on factoring. American ? workersfound no >roximateiy isfintl. February 25,1993 Date: To. Distribution From: Craig R. Larson Subject: chiysotile Asbestos Cohort Study Men Attached information from The Asbestos Institute suggests that "No Excess Lung C Detected From Chiysotile Exposures Less Than 50 fi'cc" were found in a cohort stu F.D.K. Liddell, A.D. McDonald and J.C. McDonald of McGill University. This sti largest ever undertaken and consisted of 11,000 chiysotile asbestos miners in Queb was designed to define the relationship between the exposure to chiysotile asbestos incident of lung cancer. Based upon exposure data gathered by the mines, the autho that any excess cancer mortality was found only among workers exposed to more tl for a period of 20 years or more. This study confirms the findings of other studies tl excess cancer risk as a result of low level exposure to chiysotile asbestos. The stud; further support to the opinion that the controlled use of asbestos is feasible and is tl logical approach for the continued use of chrysotile asbestos. StrUj /fv Distribution: D. Carter/Cleveland M. Davis/Cleveland .J::G2MiCfeveland CC: S. Jenkins T. Rancour S. Berner/Troy V. Keim/Troy C. Little/Troy T. Walsh/Troy A. Weiss/Jurid P. Launay/BFME P. Crouch/Mintex M. Turley/Mintex HWBUI0012238