title: Methotrexate lacks efficacy in the treatment of severe ankylosing spondylitis compared with rheumatoid and psoriatic arthritis.
authors.affiliation: Department of Nephrology and Rheumatology, Heinrich-Hence University Duesseldorf, Duesseldorf, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Ostendorf
authors.forename: C
authors.initials: C
authors.lastname: Specker
authors.forename: M
authors.initials: M
authors.lastname: Schneider