RT Journal Article SR Electronic T1 Achalasia of the Cardia and Mega-Esophagus JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 186 OP 199 VO 23 IS 3 A1 Brown, Charles H. A1 Albright, C. Peter YR 1956 UL http://www.ccjm.org/content/23/3/186.abstract AB