title: Overestimation of the prevalence of ankylosing spondylitis in the Berlin study: comment on the article by Braun et al.
authors.forename: Nurullah
authors.initials: N
authors.lastname: Akkoc
authors.forename: Muhammad Asim
authors.initials: MA
authors.lastname: Khan
mesh_terms: D001604:Berlin / Q000453:epidemiology; D006801:Humans; D015995:Prevalence; D013167:Spondylitis, Ankylosing / Q000453:epidemiology*