title: Re: Occupational asthma: prevalence or incidence.
authors.forename: D
authors.initials: D
authors.lastname: Ross
authors.forename: J C
authors.initials: JC
authors.lastname: McDonald
mesh_terms: D001249:Asthma / Q000453:epidemiology*; D006801:Humans; D015994:Incidence; D009784:Occupational Diseases / Q000453:epidemiology*; D015995:Prevalence