Nilgun ÜSTÜN, et al. “Increased Epicardial Fat Tissue Is a Marker of Subclinic Atherosclerosis in Ankylosing Spondylitis”. Archives of Rheumatology, vol. 29, no. 4, Dec. 2014, pp. 267-72, doi:10.5606/ArchRheumatol.2014.4606.