TOONE, E C Aortitis and aortic regurgitation associated with rheumatoid spondylitis. [electronic resource] - The American journal of medicine Feb 1959 - 255-63 p. digital Publication Type: Journal Article ISSN: 0002-9343 Standard No.: 10.1016/0002-9343(59)90315-8 doi Subjects--Topical Terms: Aortic Valve InsufficiencyAortitisHumansSpondylitis--complicationsSpondylitis, Ankylosing