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					| Reviews |  
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											| Review											The role of inflammation in diabetic kidney disease Su Woong Jung, Ju-Young Moon 
												Korean J Intern Med. 2021;36(4):753-766.   Published online July 1, 2021												 
													Diabetic kidney disease (DKD) has been the leading cause of chronic kidney disease for over 20 years. Yet, over these two decades, the clinical approach to this condition has not much improved beyond the administration of glucose-lowering agents, renin-angiotensin-aldosterone system blockers for blo..												 |  |  
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											| Review											Clinical and genetic characteristics of Korean autosomal dominant polycystic kidney disease patients Yun Kyu Oh, Hayne Cho Park, Hyunjin Ryu, Yong-Chul Kim, Kook-Hwan Oh 
												Korean J Intern Med. 2021;36(4):767-779.   Published online July 1, 2021												 
													Autosomal dominant polycystic kidney disease (ADPKD) is the most common hereditary kidney disease. It is characterized by cyst growth in the kidneys, resulting in kidney enlargement and end-stage kidney disease. The polycystic kidney disease 1 (PKD1) and PKD2 have been identified as ge..												 |  |  
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											| Review											Blood pressure control in patients with chronic kidney disease Jee Young Lee, Seung Hyeok Han 
												Korean J Intern Med. 2021;36(4):780-794.   Published online June 22, 2021												 
													Uncontrolled blood pressure (BP) in patients with chronic kidney disease (CKD) can lead to serious adverse outcomes. To prevent the occurrence of cardiovascular events (CVEs), and end-stage kidney disease, achieving an optimal BP level is important. Recently, there has been a paradigm shift in the m..												 |  |  
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											| Review											How important is dietary management in chronic kidney disease progression? A role for low protein diets Gang-Jee Ko, Kamyar Kalantar-Zadeh 
												Korean J Intern Med. 2021;36(4):795-806.   Published online June 22, 2021												 
													High dietary protein intake may lead to increased intraglomerular pressure and glomerular hyperfiltration, which in the long-term can lead to de novo or aggravating preexisting chronic kidney disease (CKD). Hence, a low protein diet (LPD, 0.6 to 0.8 g/kg/day) is recommended for the management of CKD..												 |  |  | Guideline |  
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											| Guideline											Evidence based guidelines for the treatment of Helicobacter pylori infection in Korea 2020 Hye-Kyung Jung, Seung Joo Kang, Yong Chan Lee, Hyo-Joon Yang, Seon-Young Park, Cheol Min Shin, Sung Eun Kim, Hyun Chul Lim, Jie-Hyun Kim, Su Youn Nam, Woon Geon Shin, Jae Myung Park, Il Ju Choi, Jae Gyu Kim, Miyoung Choi;  Korean College of Helicobacter and Upper Gastrointesinal Research 
												Korean J Intern Med. 2021;36(4):807-838.   Published online June 8, 2021												 
													Helicobacter pylori infection is one of the most common infectious diseases worldwide. H. pylori is responsible for substantial gastrointestinal morbidity with a high disease burden. Since the revision of the H. pylori Clinical Practice Guidelines in 2013 in Korea, the eradicati..												 |  |  | Editorials |  
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											| Editorial											Risk-stratified colorectal cancer screening for optimal use of colonoscopy resources Dong-Hoon Yang 
												Korean J Intern Med. 2021;36(4):839-841.   Published online July 1, 2021												 |  |  
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											| Editorial											Rivaroxaban: striking two birds with one stone Yae Min Park 
												Korean J Intern Med. 2021;36(4):842-844.   Published online July 1, 2021												 |  |  | Original Articles |  
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											| Gastroenterology / Original Article											Application of deep learning to predict advanced neoplasia using big clinical data in colorectal cancer screening of asymptomatic adults Hyo-Joon Yang, Chang Woo Cho, Jongha Jang, Sang Soo Kim, Kwang-Sung Ahn, Soo-Kyung Park, Dong Il Park 
												Korean J Intern Med. 2021;36(4):845-856.   Published online October 23, 2020												 
													Background/Aims: We aimed to develop a deep learning model for the prediction of the risk of advanced colorectal neoplasia (ACRN) in asymptomatic adults, based on which colorectal cancer screening could be customized.
Methods: We collected data on 26 clinical and laboratory parameters, including ag..												 |  |  
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											| Gastroenterology / Original Article											Helicobacter pylori-derived outer membrane vesicles stimulate interleukin 8 secretion through nuclear factor kappa B activation Mun Sun Choi, Eun Young Ze, Jae Yong Park, Tae-Seop Shin, Jae Gyu Kim 
												Korean J Intern Med. 2021;36(4):854-867.   Published online November 27, 2020												 
													Background/Aims: Bacteria-derived outer membrane vesicles (OMVs) are commonly associated with various biological activities and functions. Helicobacter pylori-derived OMVs are thought to contribute to pathogenesis. This study aimed to investigate the effects of H. pylori-derived OMVs.
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											| Gastroenterology / Original Article											Subclinical sacroiliitis detected by abdominopelvic computed tomography in Korean patients with Crohn’s disease You-Jung Ha, Hyo Jin Kim, Eugene Lee, Ji Hye Park, Young Soo Park, Yun Jong Lee, Yusuhn Kang, Hyuk Yoon 
												Korean J Intern Med. 2021;36(4):868-877.   Published online March 22, 2021												 
													Background/Aims: Sacroiliitis is a frequent extraintestinal manifestation of inflammatory bowel diseases (IBDs). This study aimed to assess the prevalence of sacroiliitis using a validated screening tool based on abdominopelvic computed tomography (APCT) in Korean patients with Crohn’s disease (CD..												 |  |  
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											| Gastroenterology / Original Article											Clinical risk factors and pattern of initial fungal contamination in endoscopic biopsy-derived gastrointestinal cancer organoid culture Su Youn Nam, Seung Jin Lee, Hee Jung Lim, Ji Young Park, Seong Woo Jeon 
												Korean J Intern Med. 2021;36(4):878-887.   Published online April 8, 2021												 
													Background/Aims: Because gastrointestinal tract is not sterile, primary culture has contamination risk despite of massive washing with antimicrobial media. Microbial contamination can play a key role in initial failure during biopsy-derived primary tumor culture.
Methods: Tumor tissue was acquired ..												 |  |  
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											| Cardiology / Original Article											Apparent treatment-resistant hypertension among ambulatory hypertensive patients: a cross-sectional study from 13 general hospitals Sehun Kim, Jin Joo Park, Mi-Seung Shin, Choong Hwan Kwak, Bong-Ryeol Lee, Sung-Ji Park, Hae-Young Lee, Sang-Hyun Kim, Seok-Min Kang, Byung-Su Yoo, Joong-Wha Chung, Si Wan Choi, Sang-Ho Jo, Jinho Shin, Dong-Ju Choi 
												Korean J Intern Med. 2021;36(4):888-897.   Published online June 7, 2021												 
													Background/Aims: To examine the prevalence and clinical characteristics of apparent treatment-resistant hypertension among ambulatory hypertensive patients.
Methods: We enrolled adult ambulatory hypertensive patients at 13 well-qualified general hospitals in Korea from January to June 2012. Apparen..												 |  |  
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											| Cardiology / Original Article											The effect of beta-blockers in acute heart failure according to heart rate Hyun-Jin Kim, Sang-Ho Jo, Min-Ho Lee, Won-Woo Seo, Jin-Oh Choi, Kyu-Hyung Ryu 
												Korean J Intern Med. 2021;36(4):898-905.   Published online September 21, 2020												 
													Background/Aims: Beta-blockers (BBs) have been shown to improve clinical outcomes in heart failure (HF) patients. We evaluated the prescribing status of BBs in patients with HF with reduced ejection fraction (HFrEF) at discharge according to the presence or not of bradycardia, and its effect on prog..												 |  |  
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											| Cardiology / Original Article											A prospective, observational study of rivaroxaban for stroke prevention in atrial fibrillation: the XANAP Korea Jaemin Shim, Young Keun On, Sun U. Kwon, Gi-Byoung Nam, Moon-Hyoung Lee, Hyung-Wook Park, Keun-Sik Hong, Nam-Ho Kim, Pierre Amarenco, Seung-Woon Rha, Dong-Gu Shin, Joung-Ho Rha, Young-Hoon Kim 
												Korean J Intern Med. 2021;36(4):906-913.   Published online June 11, 2021												 
													Background/Aims: Atrial fibrillation (AF)-related stroke accounts for 20% of ischemic strokes. Rivaroxaban use in AF patients for preventing stroke and systemic embolism was approved in 2013 in Korea. This study was to investigate the safety and effectiveness of rivaroxaban use in Korean patients wi..												 |  |  
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											| Pulmonology / Original Article											Upregulation of receptor tyrosine kinase-like orphan receptor 2 in idiopathic pulmonary fibrosis Ji-Hye Son, Jong-Uk Lee, Susie Chin, Eun-Suk Go, Jai-Seong Park, Hwa-Kyun Shin, Hun Soo Chang, Jong-Sook Park, Choon-Sik Park 
												Korean J Intern Med. 2021;36(4):914-923.   Published online September 21, 2020												 
													Background/Aims: Receptor tyrosine kinase-like orphan receptor 2 (ROR2) is a major regulator of Wnt signaling, which is involved in fibroblast dysfunction. Because its role has not been evaluated in idiopathic pulmonary fibrosis (IPF), we examined the clinical implications of ROR2 expression.
Metho..												 |  |  
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											| Pulmonology / Original Article											Pulse pressure during the initial resuscitative period in patients with septic shock treated with a protocol-driven resuscitation bundle therapy Sang-Hun Lee, Youn-Jung Kim, Gi Na Yu, Jae Cheon Jeon, Won Young Kim 
												Korean J Intern Med. 2021;36(4):924-931.   Published online August 20, 2020												 
													Background/Aims: Maintaining a mean arterial pressure (MAP) ≥ 65 mmHg during septic shock should be based on individual circumstances, but specific target is poorly understood. We investigated associations between time-weighted average (TWA) hemodynamic parameters during the initial resuscitative ..												 |  |  
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											| Endocrinology-metabolism / Original Article											Weight change and microvascular outcomes in patients with new-onset diabetes: a nationwide cohort study Eun Sil Koh, Kyung Do Han, Mee Kyoung Kim, Eun Sook Kim, Min-Kyung Lee, Ga Eun Nam, Hyuk-Sang Kwon 
												Korean J Intern Med. 2021;36(4):932-941.   Published online May 13, 2021												 
													Background/Aims: Because weight control is important in treatment of type 2 diabetes, it is essential to understand the associations between weight change and the risk of microvascular complications among patients with type 2 diabetes. We examined whether weight changes early after new-onset diabete..												 |  |  
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											| Endocrinology-metabolism / Original Article											Impact of urgently initiated tele-prescription due to COVID-19 on glycemic control in patients with type 2 diabetes Sung-Don Park, Na-young Kim, Jae-Han Jeon, Jung-Guk Kim, In-Kyu Lee, Keun-Gyu Park, Yeon-Kyung Choi 
												Korean J Intern Med. 2021;36(4):942-948.   Published online June 7, 2021												 
													Background/Aims: Coronavirus disease 2019 (COVID-19) is a global pandemic that had affected more than 13,000 people in South Korea by July 2020. To prevent spread of COVID-19, tele-prescription was permitted temporarily. This study investigated the impact of tele-prescription on glycemic control in ..												 |  |  
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											| Nephrology / Original Article											Water-soluble coenzyme Q10 provides better protection than lipid-soluble coenzyme Q10 in a rat model of chronic tacrolimus nephropathy Sheng Cui, Kang Luo, Yi Quan, Sun Woo Lim, Yoo Jin Shin, Kyung Eun Lee, Hong Lim Kim, Eun Jeong Ko, Ju Hwan Kim, Sang J. Chung, Soo Kyung Bae, Byung Ha Chung, Chul Woo Yang 
												Korean J Intern Med. 2021;36(4):949-961.   Published online January 12, 2021												 
													Background/Aims: Coenzyme Q10 (CoQ10), is a promising antioxidant; however, low bioavailability owing to lipid-solubility is a limiting factor. We developed water-soluble CoQ10 (CoQ10-W) and compared its effects with conventional lipid-soluble CoQ10
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											| Nephrology / Original Article											Role of Akt1 in renal fibrosis and tubular dedifferentiation during the progression of acute kidney injury to chronic kidney disease Il Young Kim, Yeon Kyeong Park, Sang Heon Song, Eun Young Seong, Dong Won Lee, Sun Sik Bae, Soo Bong Lee 
												Korean J Intern Med. 2021;36(4):962-974.   Published online December 16, 2020												 
													Background/Aims: Acute kidney injury (AKI) is an underestimated yet important risk factor for the development of chronic kidney disease (CKD), characterized by tubulointerstitial fibrosis and tubular dedifferentiation. Tubular dedifferentiation, which is associated with the loss of epithelial marker..												 |  |  
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											| Hemato-oncology / Original Article											Temporal evolution of programmed death-ligand 1 expression in patients with non-small cell lung cancer Chang Hyun Nam, Jaemoon Koh, Chan-Young Ock, Miso Kim, Bhumsuk Keam, Tae Min Kim, Yoon Kyung Jeon, Dong-Wan Kim, Doo Hyun Chung, Dae Seog Heo 
												Korean J Intern Med. 2021;36(4):975-984.   Published online April 6, 2021												 
													Background/Aims: Programmed death-ligand 1 (PD-L1) expression, a validated predictive biomarker for anti-PD-1/PD-L1 inhibitors, is reported to change over time. This poses challenges during clinical application in non-small cell lung cancer.
Methods: This study included patients with non-small cell..												 |  |  
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											| Hemato-oncology / Original Article											Clinical characteristics and survival of colorectal cancer patients in Korea stratified by age Sun Kyung Baek, Ji Sung Lee, In Gyu Hwang, Jong Gwang Kim, Tae Won Kim, Seung Kook Sohn, Mi Yeon Kang, Sang-Cheol Lee 
												Korean J Intern Med. 2021;36(4):985-991.   Published online April 6, 2021												 
													Background/Aims: This nationwide study was undertaken to determine differences in clinicopathologic characteristics and survival of patients with colorectal cancer (CRC) according to age using big data from the Korean National Health Insurance Service (NHIS).
Methods: The NHIS data including qualit..												 |  |  
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											| Infectious diseases / Original Article											Varicella zoster virus (VZV)-specific immunity and subclinical VZV reactivation in patients with autoimmune diseases Kwang-Hoon Lee, Sungim Choi, Ji-Soo Kwon, Sung-Han Kim, Seong Yeon Park 
												Korean J Intern Med. 2021;36(4):992-1000.   Published online June 15, 2021												 
													Background/Aims: The risk of herpes zoster (HZ) is increased in patients with autoimmune diseases (AID), probably due to immunosuppressive therapy.
Methods: This prospective cross-sectional study investigated varicella zoster virus (VZV)-specific immunity in relation to subclinical VZV reactivation..												 |  |  
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											| Allergy / Original Article											Effect of omalizumab as add-on therapy to Quality of Life Questionnaire for Korean Asthmatics (KAQLQ) in Korean patients with severe persistent allergic asthma
											
																																					[corrected-article] Jae-Woo Jung, Hae-Sim Park, Choon-Sik Park, Sang-Heon Cho, Inseon S. Choi, Hee-Bom Moon, Soon Seog Kwon, Ho Joo Yoon, Jung Won Park, Jong-Myung Lee, Dong-Chull Choi, Byoung Whui Choi 
												Korean J Intern Med. 2021;36(4):1001-1013.   Published online June 1, 2021												 
													Background/Aims: Omalizumab is the first biologic known to be effective in patients with severe allergic asthma.
Methods: This study was conducted as a multicenter, single-group, open trial to evaluate the improvement in the quality of life with the additional administration of omalizumab for 24 w..												 |  |  
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											| Rheumatology / Original Article											Developing the Korean Educational Needs Assessment Tool (Korean ENAT) in rheumatoid arthritis: cross-cultural validation using Rasch analysis Yoon-Kyoung Sung, Hyoungyoung Kim, Sung Joo Cha, Sae-Hyung Kim, Mwidimi Ndosi, Soo-Kyung Cho 
												Korean J Intern Med. 2021;36(4):1014-1022.   Published online October 30, 2020												 
													Background/Aims: This study was performed to undertake cross-cultural adaptation and validation of the Educational Needs Assessment Tool (ENAT) in rheumatoid arthritis (RA) for use in Korea.
Methods: The study involved two main phases: cross-cultural adaptation of the ENAT from English into Korean,..												 |  |  | Images of interest |  
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											| Image of interest											Exfoliative esophagitis: endoscopic and clinical profile of patient with severe chronic malnutrition Andrey P. Kiryukhin, Pavel V. Pavlov, Alexander S. Tertychnyy, Kirill B. Puzakov, Ramin T. Rzayev 
												Korean J Intern Med. 2021;36(4):1023-1024.   Published online July 31, 2020												 |  |  
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											| Image of interest											Crystalline light chain cast nephropathy in multiple myeloma Zi-Shan Lin, Xu Zhang, Yi-Yi Ma, Su-Xia Wang, Fu-De Zhou 
												Korean J Intern Med. 2021;36(4):1025-1026.   Published online June 2, 2021												 |  |  
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											| Image of interest											Infectious mononucleosis with eyelid edema and palatal petechiae Hiroaki Nakagawa, Yasushi Miyata, Masato Maekawa 
												Korean J Intern Med. 2021;36(4):1027-1028.   Published online January 8, 2021												 |  |  
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											| Image of interest											Shingles in palmar cutaneous branch of ulnar nerve Hong Ki Min, Se Hee Kim, Sang-Heon Lee, Hae-Rim Kim 
												Korean J Intern Med. 2021;36(4):1029-1030.   Published online April 22, 2020												 |  |  |