Although the U.S. Occupational Safety and Health Administration ( OSHA ) has not included them in the asbestos standard , NIOSH and the American Thoracic Society have recommended them for inclusion as regulated materials .
OSHA may also be hazardous to health .
Although the U.S. Occupational Safety and Health Administration ( OSHA ) has not included them in the asbestos standard , NIOSH and the American Thoracic Society have recommended them for inclusion as regulated materials because they may also be hazardous to health .