title: Arthritis and intestinal diseases: a comparison of two family studies.
mesh_terms: D000293:Adolescent; D000328:Adult; D001172:Arthritis, Rheumatoid / Q000150:complications* / Q000235:genetics; D003093:Colitis, Ulcerative / Q000150:complications* / Q000235:genetics; D003424:Crohn Disease / Q000150:complications* / Q000235:genetics; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013122:Spinal Diseases / Q000150:complications / Q000235:genetics; D013167:Spondylitis, Ankylosing / Q000150:complications / Q000235:genetics