RT Journal Article SR Electronic T1 A 74-year-old man with abdominal pain JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 363 OP 368 DO 10.3949/ccjm.80a.12080 VO 80 IS 6 A1 Khan, Maqsood A. A1 Patel, Kevin B. A1 March, Robert J. A1 Nooruddin, Mohammed A1 Brown, Michael D. YR 2013 UL http://www.ccjm.org/content/80/6/363.abstract AB