[P-700] Optimal number of needle passes by endoscopic ultrasound guided fine needle aspiration for obtaining adequate diagnosis
○Sang-Woo Cha, Tae Seung Lee, Tae Hee Lee, Tae Hoon Lee, Hyun Jong Choi, Soung Won Jung, Jae Young Jang, Jong Ho Moon, Young Deok Cho, Sang-Heum Park, Sun Joo Kim(Digestive Disease Center,Soonchunhyang University, College of Medicine, Korea)
