title: Occupational exposure limits--at the crossroads.
authors.forename: Malcolm R
authors.initials: MR
authors.lastname: Sim
mesh_terms: D005060:Europe; D006801:Humans; D008452:Maximum Allowable Concentration; D016273:Occupational Exposure / Q000009:adverse effects / Q000517:prevention & control / Q000592:standards*; D016272:Occupational Health