RT Journal Article SR Electronic T1 Barium esophagography (February 2009) JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 218 OP 218 DO 10.3949/ccjm.76c.04001 VO 76 IS 4 A1 David L. Keller YR 2009 UL http://www.ccjm.org/content/76/4/218.1.abstract AB