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 Maqsood A. Khan A1 Kevin B. Patel A1 Robert J. March A1 Mohammed Nooruddin A1 Michael D. Brown YR 2013 UL http://www.ccjm.org/content/80/6/363.abstract AB