[O03-01] Endoscopic screening for synchronous esophageal neoplasm in head and neck squamous cell carcinoma
○Eun Jeong Gong, Do Hoon Kim, Hwoon-Yong Jung, Hyun Lim, Ji Yong Ahn, Kwi-Sook Choi, Jeong Hoon Lee, Kee Don Choi, Ho June Song, Gin Hyug Lee, Jin Ho Kim(Departments of Gastroenterology, Asan Medical Center)
