This statement was prepared by the Occupational Medical Practice Committee of the American Occupational Medical Association: Bruce W. Karrh, M.D., Chairman; Bruce H. Bennett, M.D.; Caesar Briefer, M.D.; Robert M. DeuPree, M.D.; William G. Mays, M.D.; James W. Mitchell, M.D.; Robert H. Moore, M.D.; Billie H. Shevick, M.D.; W. Lloyd Wright, M.D. The statement was approved by the AOMA Board of Directors at its meeting April 20-21, 1979, in Anaheim, Calif.