title: Umbilical extrusion in patients with ankylosing spondylitis.
authors.forename: I
authors.initials: I
authors.lastname: Jajić
authors.forename: Z
authors.initials: Z
authors.lastname: Jajić
mesh_terms: D000009:Abdominal Muscles / Q000473:pathology; D003964:Diaphragm; D006801:Humans; D012119:Respiration; D013167:Spondylitis, Ankylosing / Q000150:complications*; D014472:Umbilicus / Q000473:pathology*