occupational exposures
The risk of asthma        attributable to occupational exposures is probably underappreciated due to       underreporting and to inappropriate use of narrow definitions of exposure in       epidemiologic studies of attributable risk.
The risk of  @OBJECT$          @PREDICAT$  to  @SUBJECT$  is probably underappreciated due to       underreporting and to inappropriate use of narrow definitions of exposure in       epidemiologic studies of attributable risk.