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机构:
Sungkyunkwan Univ, Kangbuk Samsung Hosp, Dept Internal Med, Div Gastroenterol,Sch Med, Seoul, South Korea
Sungkyunkwan Univ, Kangbuk Samsung Hosp, Gastrointestinal Canc Ctr, Sch Med, Seoul, South Korea Seoul Natl Univ, Dept Internal Med, Coll Med, Seoul, South Korea