Butterfly in the esophagus: what is wrong?
Department of Gastroenterology, Korea University Guro Hospital, Seoul, Korea.
Jin Ki
JK
Hwang
Seung Goun
SG
Hong
Moon Kyung
MK
Joo
Jong-Jae
JJ
Park
Jae Seon
JS
Kim
Young-Tae
YT
Bak