RT Journal Article SR Electronic T1 Transesophageal echocardiography: usefulness increasing JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 346 OP 347 VO 60 IS 5 A2 William S. Wilke A1 William J. Stewart YR 1993 UL http://www.ccjm.org/content/60/5/346.abstract AB