title: Re: "Coexisting seronegative rheumatoid arthritis and ankylosing spondylitis".
authors.forename: Bruce M
authors.initials: BM
authors.lastname: Rothschild
mesh_terms: D001172:Arthritis, Rheumatoid / Q000150:complications* / Q000175:diagnosis; D006801:Humans; D013167:Spondylitis, Ankylosing / Q000150:complications*