title: Ankylosing spondylitis in twins: comment on the article by Brown et al.
authors.forename: W H
authors.initials: WH
authors.lastname: James
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D006801:Humans; D008875:Middle Aged; D015995:Prevalence; D013167:Spondylitis, Ankylosing / Q000453:epidemiology*; D018433:Twin Studies as Topic