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Sung IK. Efficacy and safety of DWJ1252 compared with Gasmotin® in the treatment of functional dyspepsia: a multicenter, randomized, double-blind, active-controlled study. Journal of Neurogastroenterology and Motility. 2021 Jan;27(1):87-96.

Kim JY, Kim JH, Sung IK, Park HK, Lee SY. Efficacy and safety of twice a day, bismuth-containing quadruple therapy using high-dose tetracycline and metronidazole for second-line Helicobacter pylori eradication. Helicobacter. 2020 Apr;25(2):e12683.

Lee SP, Sung IK, Kim JH, Lee SY, Park HS. Effect of prophylactic endoscopic closure for an artificial ulceration after colorectal endoscopic submucosal dissection: a randomized controlled trial. Scandinavian Journal of Gastroenterology. 2019 Oct;54(10):1291-1299.

Lee SP, Sung IK, Kim JH, Lee SY, Park HS, Shim CS. Effect of Preceding Biopsy on the Results of Endoscopic Submucosal Dissection for Colorectal Laterally Spreading Tumor. Digestive Diseases and Sciences. 2019 Oct;64(10):2972-2981.

Kwon H, Lee SY, Kim JH, Lee SP, Kim JH, Sung IK, Park HS, Shim CS. ABC Classification Is Less Useful for Older Koreans Born before 1960. Gut and Liver. 2019 Sep;13(5):522-530.

Lee SP, Sung IK, Kim JH, Lee SY, Park HS, Shim CS. Usefulness of Carbohydrate Antigen 19-9 Test in Healthy People and Necessity of Medical Follow-up in Individuals with Elevated Carbohydrate Antigen 19-9 Level. Korean Journal of Family Medicine. 2019 Sep;40(5):314-322.

김영중, 이선영, 양호준, 김정환, 성인경, 박형석. 위축성 위염과 화생성 위염의 전구 병변으로서 결절성 위염의 의의. Korean Journal of Gastroenterology. 2019 Jun;73(6):332-340.

Lee KJ [et al.]. Randomised phase 3 trial: tegoprazan, a novel potassium-competitive acid blocker, vs. esomeprazole in patients with erosive oesophagitis. Alimentary Pharmacology & Therapeutics. 2019 Apr;49(7):864-872.

Chung HW, Kim JH, Sung IK, Lee SY, Park HS, Shim CS, Bang HY, So Y, Lee EJ. FDG PET/CT to predict the curability of endoscopic resection for early gastric cancer. Journal of Cancer Research and Clinical Oncology. 2019 Mar;145(3):759-764.

Yoshida N, Naito Y, Inada Y, Itoh Y, Lee SP, Kim JH, Sung IK, Park HS, Han HS, Nakanishi M, Kishimoto M, Lee SY. Cross-national analysis about the difference of histopathological management in Tis and T1 colorectal cancer between Japan and Korea. Journal of the Anus, Rectum and Colon. 2019 Jan;3(1):18-26.

Lee SP, Kim JH, Lee SY, Park HS, Shim CS, Ki HK, Sung IK. A randomized controlled trial of prophylactic antibiotics in the prevention of electrocoagulation syndrome after colorectal endoscopic submucosal dissection. Gastrointestinal Endoscopy. 2017 Aug;86(2):349-57.

Lee SP, Kim JH, Sung IK, Park HS, Shim CS, Lee SY. Factors Related to Upper Gastrointestinal Symptom Generation in 2275 Helicobacter pylori Seroprevalent Adults. Digestive Diseases and Sciences. 2017 Jun;62(6):1561-70.

Lee SP, Kim JH, Sung IK, Park HS, Shim CS, Lee SY. Link between Serum Pepsinogen Concentrations and Upper Gastrointestinal Endoscopic Findings. Journal of Korean Medical Science. 2017 May;32(5):796-802.

Lee SY, Kim JH, Sung IK, Park HS, Shim CS, Lee SP, Han HS. Differences in Prevalence of Lymphovascular Invasion among Early Gastric Cancers between Korea and Japan. Gut and Liver. 2017 May;11(3):383-91.

Lee SM, Kim JH, Sung IK, Hong SN. The Risk of Metachronous Advanced Colorectal Neoplasia Rises in Parallel with an Increasing Number of High-Risk Findings at Baseline. Gut Liver. 2015 Nov 23;9(6):741-9.

Rahman I, Pioche M, Shim CS, Lee SP, Sung IK, Saurin JC, Patel P. Magnetic-assisted capsule endoscopy in the upper GI tract by using a novel navigation system (with video). Gastrointest Endosc. 2015 Sep 25.

Lee SP, Sung IK. The Effect of Stress and Depression on Gastrointestinal Diseases: Author's Reply. J Neurogastroenterol Motil. 2015 Jul 30;21(3):453.

Choi MG, Rhee PL, Park H, Lee OY, Lee KJ, Choi SC, Seol SY, Chun HJ, Rew JS, Lee DH, Song GA, Jung HY, Jeong HY, Sung IK, Lee JS, Lee ST, Kim SK, Shin YW. Randomized, Controlled, Multi-center Trial: Comparing the Safety and Efficacy of DA-9701 and Itopride Hydrochloride in Patients With Functional Dyspepsia. J Neurogastroenterol Motil. 2015 Jul 30;21(3):414-22.

Lee SP, Sung IK, Kim JH, Lee SY, Park HS, Shim CS, Hwang HK, Kim TY, Shim SG. Comparison of dexmedetomidine with on-demand midazolam versus midazolam alone for procedural sedation during endoscopic submucosal dissection of gastric tumor. J Dig Dis. 2015 Jul;16(7):377-84.

정경원, 성인경. Helicobacter pylori 제균치료 성공률의 변화에 대한 10년 간의 후향적 연구. The Korean Journal of Helicobacter and Upper Gastrointestinal Research. 2015 Jun; 15(02) 112-116.

Kim YB, Lee SY, Kim JH, Sung IK, Park HS, Shim CS, Han HS. Microsatellite Instability of Gastric and Colorectal Cancers as a Predictor of Synchronous Gastric or Colorectal Neoplasms. Gut Liver. 2015 Jun 19.

Lee SP, Kim JH, Sung IK, Lee SY, Park HS, Shim CS, Han HS. Effect of submucosal fibrosis on endoscopic submucosal dissection of colorectal tumors: pathologic review of 173 cases. J Gastroenterol Hepatol. 2015 May;30(5):872-8.

Lee SP, Sung IK, Kim JH, Lee SY, Park HS, Shim CS. The effect of emotional stress and depression on the prevalence of digestive diseases. J Neurogastroenterol Motil. 2015 Mar 30;21(2):273-82.

Lee SP, Lee SY, Kim JH, Sung IK, Park HS, Shim CS, Moon HW. Correlation between Helicobacter pylori infection, IgE hypersensitivity, and allergic disease in Korean adults. Helicobacter. 2015 Feb;20(1):49-55.

Hong MJ, Sung IK, Lee SP, Cheon BK, Kang H, Kim TY. Randomized comparison of recovery time after use of remifentanil alone versus midazolam and meperidine for colonoscopy anesthesia. Dig Endosc. 2015 Jan;27(1):113-20.

Hong MJ, Kim JH, Lee SY, Sung IK, Park HS, Shim CS. Prevalence and clinical features of coagulation syndrome after endoscopic submucosal dissection for colorectal neoplasms. Dig Dis Sci. 2015 Jan;60(1):211-6.

Lee SP, Sung IK, Kim JH, Lee SY, Park HS, Shim CS. Risk factors for incomplete polyp resection during colonoscopic polypectomy. Gut Liver. 2015 Jan;9(1):66-72.

Lee SP, Sung IK, Kim JH, Lee SY, Park HS, Shim CS. The clinical course of asymptomatic esophageal candidiasis incidentally diagnosed in general health inspection. Scand J Gastroenterol. 2015;50(12):1444-50.

Hong MJ, Lee SY, Kim JH, Sung IK, Park HS, Shim CS, Jin CJ. Rebleeding after initial endoscopic hemostasis in peptic ulcer disease. J Korean Med Sci. 2014 Oct;29(10):1411-5.

Choi HS, Shim CS, Kim GW, Kim JS, Lee SY, Sung IK, Park HS, Kim JH. Orange juice intake reduces patient discomfort and is effective for bowel cleansing with polyethylene glycol during bowel preparation. Dis Colon Rectum. 2014 Oct;57(10):1220-7.

김정환, 성인경. 과민성 장증후군의 최근 동향: 식이와 과민성 장증후군. 대한소화기학회지. 64권 3회. 2014 Sep 25;64(3):142-7.

Ahn SH, Park YK, Park ES, Kim JH, Kim DH, Lim KH, Jang MS, Choe WH, Ko SY, Sung IK, Kwon SY, Kim KH. The impact of the hepatitis B virus polymerase rtA181T mutation on replication and drug resistance is potentially affected by overlapping changes in surface gene. J Virol. 2014 Jun;88(12):6805-18.

Choi HS, Lee SY, Kim JH, Sung IK, Park HS, Shim CS, Jin CJ. Combining the serum pepsinogen level and Helicobacter pylori antibody test for predicting the histology of gastric neoplasm. J Dig Dis. 2014 Jun;15(6):293-8.

Chung HA, Lee SY, Lee HJ, Kim JH, Sung IK, Shim CS, Jin CJ, Park HS. G protein β3 subunit polymorphism and long-term prognosis of functional dyspepsia. Gut Liver. 2014 May;8(3):271-6.

Yang JH, Kang HS, Lee SY, Kim JH, Sung IK, Park HS, Shim CS, Jin CJ. Recurrence of gastroesophageal reflux disease correlated with a short dinner-to-bedtime interval. J Gastroenterol Hepatol. 2014 Apr;29(4):730-5.

Lee SP, Sung IK, Kim JH, Lee SY, Park HS, Shim CS. The effect of preceding biopsy on complete endoscopic resection in rectal carcinoid tumor. J Korean Med Sci. 2014 Apr;29(4):512-8.

Choi HS, Lee SY, Kim JH, Sung IK, Park HS, Shim CS, Jin CJ, Han HS. Low prevalence of microsatellite instability in interval gastric cancers. Dig Dis Sci. 2014 Feb;59(2):322-7 .

Lee KN, Lee OY, Choi MG, Sohn CI, Huh KC, Park KS, Kwon JG, Kim N, Rhee PL, Myung SJ, Lee JS, Lee KJ, Park H, Lee YC, Choi SC, Jung HK, Jee SR, Choi CH, Kim GH, Park MI, Sung IK. Efficacy and Safety of Tiropramide in the Treatment of Patients With Irritable Bowel Syndrome: A Multicenter, Randomized, Double-blind, Non-inferiority Trial, Compared With Octylonium. J Neurogastroenterol Motil. 2014 Jan;20(1):113-21.

Cheon YK, Lee TY, Sung IK, Shim CS. Clinical feasibility of a new through-the-scope fully covered esophageal self-expandable metallic stent: an in vivo animal study. Dig Endosc. 2014 Jan;26(1):32-6.

Kim SI, Han HS, Kim JH, Lee KJ, Hong SN, Lee SY, Kim HU, Sung TS, Zheng H, Sung IK, Park HS, Shim CS. What is the next step for gastric atypical epithelium on histological findings of endoscopic forceps biopsy?. Dig Liver Dis. 2013 Jul;45(7):573-7.

Lee JH, Kim BK, Seol DC, Byun SJ, Park KH, Sung IK, Park HS, Shim CS. Rescue endoscopic bleeding control for nonvariceal upper gastrointestinal hemorrhage using clipping and detachable snaring. Endoscopy. 2013 Jun;45(6):489-92.

Kim JH, Sung IK, Hong SN, Lee SY, Park HS, Shim CS. Is the proton pump inhibitor test helpful in patients with laryngeal symptoms?. Dig Dis Sci. 2013 Jun;58(6):1663-7.

Lee JY, Hong SN, Kim JH, Choe WH, Lee SY, Sung IK, Park HS, Shim CS. Risk for coronary heart disease increases risk for colorectal neoplasm. Clin Gastroenterol Hepatol. 2013 Jun;11(6):695-702.

Park JH, Park H, Lee DH, Sung IK. A randomized, double blinded, clinical trial to assess the efficacy and cost effectiveness of omeprazole compared to rabeprazole in the maintenance therapy of patients with gastroesophageal reflux disease. J Neurogastroenterol Motil. 2013 Apr;19(2):219-26.

Park HS, Lee SY, Hong SN, Kim JH, Sung IK, Park HS, Shim CS, Jin CJ. Early Gastric Cancer-Like Advanced Gastric Cancer versus Advanced Gastric Cancer-Like Early Gastric Cancer. Clin Endosc. 2013 Mar;46(2):155-60.

Kang HS, Hong SN, Kim YS, Park HS, Kim BK, Lee JH, Kim SI, Lee TY, Kim JH, Lee SY, Sung IK, Shim CS. The efficacy of i-SCAN for detecting reflux esophagitis: a prospective randomized controlled trial. Dis Esophagus. 2013 Feb-Mar;26(2):204-11.

Yoon JY, Kim JH, Lee JY, Hong SN, Lee SY, Sung IK, Park HS, Shim CS, Han HS. Clinical outcomes for patients with perforations during endoscopic submucosal dissection of laterally spreading tumors of the colorectum. Surg Endosc. 2013 Feb;27(2):487-93.

Hong SN, Sung IK, Kim JH, Choe WH, Kim BK, Ko SY, Lee JH, Seol DC, Ahn SY, Lee SY, Park HS, Shim CS. The Effect of the Bowel Preparation Status on the Risk of Missing Polyp and Adenoma during Screening Colonoscopy: A Tandem Colonoscopic Study. Clin Endosc. 2012 Nov;45(4):404-11.

Seo TH, Kim JH, Ko SY, Hong SN, Lee SY, Sung IK, Park HS, Shim CS, Han HS. Cytomegalovirus colitis in immunocompetent patients: a clinical and endoscopic study. Hepatogastroenterology. 2012 Oct;59(119):2137-41.

Lee HH, Lee SY, Yoon HY, Hong SN, Kim JH, Sung IK, Park HS, Shim CS, Han HS. Change of mucosal color in early gastric cancer. J Dig Dis. 2012 Oct;13(10):510-6.

Ko SY, Kim SI, Kim JH, Lee JH, Lee KJ, Hong SN, Lee SY, Sung IK, Park HS, Shim CS. Clinically distinct characteristics in patients younger than 40 years old with non-cardiac chest pain. J Gastroenterol Hepatol. 2012 Sep;27(9):1484-9.

Hong SN, Lee SM, Kim JH, Lee TY, Kim JH, Choe WH, Lee SY, Cheon YK, Sung IK, Park HS, Shim CS. Helicobacter pylori infection increases the risk of colorectal adenomas: cross-sectional study and meta-analysis. Dig Dis Sci. 2012 Aug;57(8):2184-94.

Hong SN, Jo S, Jang JH, Choi J, Kim S, Ahn SY, Kim JH, Choe WH, Lee SY, Sung IK, Park HS, Shim CS. Clinical characteristics and the expression profiles of inflammatory cytokines/cytokine regulatory factors in asymptomatic patients with nodular gastritis. Dig Dis Sci. 2012 Jun;57(6):1486-95.

Hong SN, Choe WH, Lee JH, Kim SI, Kim JH, Lee TY, Kim JH, Lee SY, Cheon YK, Sung IK, Park HS, Shim CS. Prospective, randomized, back-to-back trial evaluating the usefulness of i-SCAN in screening colonoscopy. Gastrointest Endosc. 2012 May;75(5):1011-1021.

Hong SN, Kim JH, Choe WH, Lee SY, Seol DC, Moon HW, Hur M, Yun YM, Sung IK, Park HS, Shim CS. Circulating vitamin D and colorectal adenoma in asymptomatic average-risk individuals who underwent first screening colonoscopy: a case-control study. Dig Dis Sci. 2012 Mar;57(3):753-63.

Shin WG, Kim HU, Song HJ, Hong SJ, Shim KN, Sung IK, Kim JG; Korean College of Helicobacter and Upper Gastrointestinal Research. Surveillance strategy of atrophic gastritis and intestinal metaplasia in a country with a high prevalence of gastric cancer. Dig Dis Sci. 2012 Mar;57(3):746-52.

Hong SJ, Sung IK, Kim JG, Lee SW, Choi SC, Yang CH, Lee SI, Lee DH, Kim GH, Jeon SW, Park MI, Park SK, Park BJ, Seol SY; H. pylori and Dyspepsia Study Group of Korean College of Helicobacter and Upper Gastrointestinal Research. Failure of a Randomized, Double-Blind, Placebo-Controlled Study to Evaluate the Efficacy of H. pylori Eradication in H. pylori-Infected Patients with Functional Dyspepsia. Gut Liver. 2011 Dec;5(4):468-71.

Lee KJ, Kim JH, Kim SI, Jang JH, Lee HH, Hong SN, Lee SY, Sung IK, Park HS, Shim CS, Han HS. Clinical significance of colonoscopic examination in patients with early stage of gastric neoplasm undergoing endoscopic submucosal dissection. Scand J Gastroenterol. 2011 Nov;46(11):1349-54.

Zhu MH, Sung IK, Zheng H, Sung TS, Britton FC, O'Driscoll K, Koh SD, Sanders KM. Muscarinic activation of Ca2+-activated Cl- current in interstitial cells of Cajal. J Physiol. 2011 Sep 15;589(Pt 18):4565-82.

Ahn SY, Lee SY, Hong SN, Kim JH, Sung IK, Park HS, Shim CS, Jin CJ, Han HS. Endoscopic diagnosis of open-type atrophic gastritis is related to the histological diagnosis of intestinal metaplasia and Cdx2 expression. Dig Dis Sci. 2011 Apr;56(4):1119-26.

성인경, 김영춘, 윤중원, 서현일, 박동일, 조용균, 김홍주, 박정호, 손정일, 전우규. 위내시경검사에서 간과된 진행성 위암의 특징. 대한소화기학회지. 57권 5호. 2011 May 25;57(5):288-93.

Lee HJ, Lee SY, Kim JH, Sung IK, Park HS, Jin CJ, Kang SG, Yoon H, Chun HJ. Depressive mood and quality of life in functional gastrointestinal disorders: differences between functional dyspepsia, irritable bowel syndrome and overlap syndrome. Gen Hosp Psychiatry. 2010 Sep-Oct;32(5):499-502.

Hong SN, Kim JH, Choe WH, Han HS, Sung IK, Park HS, Shim CS. Prevalence and risk of colorectal neoplasms in asymptomatic, average-risk screenees 40 to 49 years of age. Gastrointest Endosc. 2010 Sep;72(3):480-9.

Lee HJ, Lee SY, Choi JE, Kim JH, Sung IK, Park HS, Jin CJ. G protein beta3 subunit, interleukin-10, and tumor necrosis factor-alpha gene polymorphisms in Koreans with irritable bowel syndrome. Neurogastroenterol Motil. 2010 Jul;22(7):758-63.