DIRECT PERORAL CHOLANGIOSCOPY WITH AN ULTRASLIM ENDOSCOPE AND INTRADUCTAL BALLOON WITHOUT THE USE OF A PREVIOUSLY PLACED GUIDEWIRE TO MAINTAIN ACCESS: A FEASIBILITY STUDY
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- Lee, Tae Yoon
- Kim, Jung Hwan
- Choe, Won Hyeok
- Sung, In Kung
- Park, Hyeong Suk
- Choi, Eun Kwang
- Shim, Chan Sup
Digestive Endoscopy 22(4):p A67, October 2010.

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