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- 저자 ( Hyun Jik Lee ) ( Chang Min Cho ) ( Jun Heo ) ( Min Kyu Jung ) ( Tae Nyeun Kim ) ( Kook Hyun Kim ) ( Hyunsoo Kim ) ( Kwang Bum Cho ) ( Ho Gak Kim ) ( Jimin Han ) ( Dong Wook Lee ) ( Yoon Suk Lee )
- 주제어 Adverse events Endoscopic experience Hospital volume Cholangiopancreatography endoscopicretrograde