Operational Definitions of Colorectal Cancer in the Korean National Health Insurance Database by Hyeree Park, Yu Rim Kim, Yerin Pyun, Hyundeok Joo, Aesun Shin

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Association between gallstones and the risk of biliary tract cancer: a systematic review and meta-analysis by Dan Huang, Hyundeok Joo, Nan Song, Sooyoung Cho, Woosung Kim, Aesun Shin

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Comparison of patient perceptions of primary care quality across healthcare facilities in Korea: A cross-sectional study. by Yongjung Cho, Heeyoung Chung, Hyundeok Joo, Hyung Jun Park, Hee-Kyung Joh, Ji Won Kim, Jong-Koo Lee

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