RT Journal Article SR Electronic T1 Transoesophageal echocardiography: a new diagnostic method in paediatric cardiology. JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 1175 OP 1177 DO 10.1136/adc.66.10.1175 VO 66 IS 10 A1 O Stümper YR 1991 UL http://adc.bmj.com/content/66/10/1175.abstract AB