title: Shortcomings in discussion.
authors.forename: Vilhjálmur
authors.initials: V
authors.lastname: Rafnsson
mesh_terms: D000401:Aircraft; D015986:Confounding Factors, Epidemiologic; D006801:Humans; D015201:Meta-Analysis as Topic; D009369:Neoplasms / Q000453:epidemiology* / Q000209:etiology; D009784:Occupational Diseases / Q000453:epidemiology* / Q000209:etiology; D014195:Travel