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					| Rapid Communication |  
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											| Rapid Communication											The proposed algorithm for emergency endoscopy during the coronavirus disease 2019 outbreak Sung Bum Kim, Kook Hyun Kim 
												Korean J Intern Med. 2020;35(5):1027-1030.   Published online July 16, 2020												 
													Following the coronavirus disease 2019 outbreak in China, more than 10,765 patients tested positive for severe acute respiratory syndrome coronavirus 2 from February 18, 2020 to April 30, 2020 in South Korea. Performing emergency endoscopy is extremely challenging from the clinicians’ viewpoint du..												 |  |  | Reviews |  
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											| Review											Squamous cell carcinoma of head and neck: what internists should know Kyungsuk Jung, Manpreet Narwal, Seon Young Min, Bhumsuk Keam, Hyunseok Kang 
												Korean J Intern Med. 2020;35(5):1031-1044.   Published online July 14, 2020												 
													Squamous cell carcinoma of head and neck (SCCHN) is a group of cancer arising from mucosal surfaces of the head and neck. Optimal management of SCCHN requires a multidisciplinary team of surgical oncologists, radiation oncologists, medical oncologists, nutritionist, and speech-language pathologists,..												 |  |  
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											| Review											Proprotein convertase subtilisin/kexin type 9 inhibition in cardiovascular disease: current status and future perspectives Kyung Hoon Cho, Young Joon Hong 
												Korean J Intern Med. 2020;35(5):1045-1058.   Published online August 28, 2020												 
													Proprotein convertase subtilisin/kexin type 9 (PCSK9) targets the degradation of low-density lipoprotein (LDL) receptors; it has been proved that its inhibition improves cardiovascular outcomes in patients with established atherosclerotic cardiovascular disease (ASCVD). Herein, we review the current..												 |  |  
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											| Review											Clinical spectrum and diagnosis of diabetic neuropathies Jeeyoung Oh 
												Korean J Intern Med. 2020;35(5):1059-1069.   Published online August 28, 2020												 
													Neuropathy is the most prevalent microvascular complication of diabetes mellitus; it encompasses distal symmetric polyneuropathy, autonomic neuropathy, radiculoplexus neuropathy, mononeuropathy, and treatment-induced neuropathy. The prevalence rate of diabetic neuropathy in Korea was reported to be ..												 |  |  | Editorials |  
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											| Editorial											What does left atrial structural remodeling mean in cardiac resynchronization therapy? Sung-Hee Shin 
												Korean J Intern Med. 2020;35(5):1070-1071.   Published online August 28, 2020												 |  |  
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											| Gastroenterology / Original Article											Effects of vitamin D supplements in patients with chronic hepatitis C: a randomized, multi-center, open label study Jae Yoon Jeong, Dae Won Jun, Sol Ji Park, Joo Hyun Sohn, Sang Gyune Kim, Se Whan Lee, Soung Won Jeong, Moon Young Kim, Won Kim, Jae-Jun Shim, Hyoung Su Kim, Ki Tae Suk, Sang Bong Ahn 
												Korean J Intern Med. 2020;35(5):1074-1083.   Published online November 12, 2019												 
													Background/Aims: We aimed to assess the role of vitamin D supplementation in the response to pegylated interferon-α (PEG-IFN-α) plus ribavirin (RBV) treatment in patients with chronic hepatitis C (CHC).
Methods: Our study was a multi-center, randomized controlled trial in 11 hospitals. CHC patient..												 |  |  
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											| Gastroenterology / Original Article											Proton pump inhibitor use is associated with hip fracture development: a nationwide population-based cohort study Yang Won Min, Yeong Chan Lee, Kyunga Kim, Seungho Ryu, Kyoung Sub Hong, Han Ho Jeon, Yong Sung Kim, Jong Heon Park, Hee Jung Son, Poong-Lyul Rhee 
												Korean J Intern Med. 2020;35(5):1084-1093.   Published online November 4, 2019												 
													Background/Aims: Effect of proton pump inhibitor (PPI) use on the risk of hip fracture is controversial. This study aimed to clarify the association between PPI use and hip fracture risk using a large cohort.
Methods: This study recruited participants from the nationwide cohort (n = 1,025,340). Aft..												 |  |  
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											| Gastroenterology / Original Article											Impact of previous metronidazole exposure on metronidazole-based second-line quadruple therapy for Helicobacter pylori infection Gil Ho Lee, Kee Myung Lee, Sung Jae Shin, Joon Koo Kang, Choong-Kyun Noh, Jin Hong Kim, Sun Gyo Lim 
												Korean J Intern Med. 2020;35(5):1094-1103.   Published online July 31, 2020												 
													Background/Aims: The negative effects on the eradication success of Helicobacter pylori infection after previous exposure to macrolides, including clarithromycin on clarithromycin-based first-line therapy have been demonstrated. However, whether this is true for metronidazole-based second-lin..												 |  |  
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											| Gastroenterology / Original Article											Impact of early anti-TNF use on clinical outcomes in Crohn’s disease: a nationwide population-based study Yoon Suk Jung, Minkyung Han, Sohee Park, Jae Hee Cheon 
												Korean J Intern Med. 2020;35(5):1104-1113.   Published online April 21, 2020												 
													Background/Aims: The optimal timing for initiation of anti-tumor necrosis factor (TNF) therapy in Crohn’s disease (CD) is still debated. Little is known about the clinical outcomes of early versus late administration of anti-TNF agents, especially in Asian CD patients. We aimed to evaluate the imp..												 |  |  
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											| Cardiology / Original Article											Differential efficacy between stenting and plain balloon angioplasty for femoropopliteal disease with or without total occlusion In-Ho Chae, Chang-Hwan Yoon, Young-Guk Ko, Pil-Ki Min, Jae-Hwan Lee, Cheol Woong Yu, Seung Whan Lee, Sang-Rok Lee, Seung Hyuk Choi, Yoon Seok Koh, Donghoon Choi;  the K-VIS investigators 
												Korean J Intern Med. 2020;35(5):1114-1124.   Published online February 24, 2020												 
													Background/Aims: Whether the presence of chronic total occlusion (CTO) affects patency after stenting in femoropopliteal lesions is unknown. We determined the effects of plain balloon angioplasty (POBA) in comparison with those of stenting on patency for femoropopliteal CTO and stenosis (non-CTO).
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											| Cardiology / Original Article											Left ventricular response after cardiac resynchronization therapy is related to early left atrial volume reduction In-Jeong Cho, Jae-Sun Uhm, Jaewon Oh, Jong-Ho Nam, Hee Tae Yu, Taehoon Kim, Boyoung Joung, Seok-Min Kang 
												Korean J Intern Med. 2020;35(5):1125-1135.   Published online February 6, 2020												 
													Background/Aims: The current study aimed to elucidate a time-course change in left atrial volume after cardiac resynchronization therapy (CRT) and to verify factors associated with left atrial volume reduction (LAVR) and its prognostic implications.
Methods: The records of 97 patients were retrospe..												 |  |  
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											| Pulmonology / Original Article											The health-related quality-of-life of chronic obstructive pulmonary disease patients and disease-related indirect burdens Hye Sook Choi, Dong-Wook Yang, Chin Kook Rhee, Hyoung Kyu Yoon, Jin Hwa Lee, Seong Yong Lim, Yu-Il Kim, Kwang Ha Yoo, Yong-Il Hwang, Sang Haak Lee, Yong Bum Park 
												Korean J Intern Med. 2020;35(5):1136-1144.   Published online February 20, 2020												 
													Background/Aims: Many chronic obstructive pulmonary disease (COPD) patients have physical limitations. We investigated EuroQol five-dimensions five-level (EQ-5D-5L) of COPD patients to assess quality of life, and assessed indirect burden including time expenditure to visit doctor, home care rate, an..												 |  |  
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											| Pulmonology / Original Article											Changes in chest X-ray findings in 1- and 2-month group after treatment initiation for suspected pulmonary tuberculosis Jang Ho Lee, Ock-Hwa Kim, Yeon Joo Kim, Tae Sun Shim, Kyung-Wook Jo 
												Korean J Intern Med. 2020;35(5):1145-1153.   Published online February 18, 2020												 
													Background/Aims: Although re-evaluation of radiographic follow-up after 2 to 3 months of therapy is recommended for patients administered anti-tuberculosis medication owing to suspected pulmonary tuberculosis, reported findings are limited. Therefore, this study aimed to investigate changes in 1- an..												 |  |  
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											| Pulmonology / Original Article											Impact of gender on chronic obstructive pulmonary disease outcomes: a propensity score-matched analysis of a prospective cohort study Jaeyoung Cho, Chang-Hoon Lee, Deog Kyeom Kim, Hun-Gyu Hwang, Yu-Il Kim, Hye Sook Choi, Jeong-Woong Park, Kwang Ha Yoo, Ki-Suck Jung, Sang-Do Lee;  the KOLD and KOCOSS Investigators 
												Korean J Intern Med. 2020;35(5):1154-1163.   Published online February 27, 2020												 
													Background/Aims: Despite increasing awareness of the burden of chronic obstructive pulmonary disease (COPD) in women, knowledge regarding gender differences in COPD outcomes is limited. Therefore, we aimed to evaluate whether COPD outcomes, including exacerbations, lung function, and symptoms differ..												 |  |  
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											| Endocrinology-metabolism / Original Article											The clinical meaning of pre- and post-ablation thyroglobulin levels at first radioiodine therapy in patients with papillary thyroid cancer Hee Kyung Kim, Jee Hee Yoon, Jin Seong Cho, Seong Young Kwon, Su Woong Yoo, Ho-Cheol Kang 
												Korean J Intern Med. 2020;35(5):1164-1172.   Published online July 29, 2019												 
													Background/Aims: This study was conducted to identify prognostic factors in patients with papillary thyroid cancer (PTC) at the time of first radioactive iodine (RAI) therapy, and to evaluate the clinical value of the thyroglobulin (Tg) increase after RAI.
Methods: Serum Tg was sampled prior to (pr..												 |  |  
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											| Nephrology / Original Article											Current findings of kidney biopsy including nephropathy associated with hypertension and diabetes mellitus in Korea Kipyo Kim, Sang Ho Lee, Sung Woo Lee, Jung Pyo Lee, Ho Jun Chin;  on behalf of the Korean GlomeruloNEphritis sTudy (KoGNET) Group 
												Korean J Intern Med. 2020;35(5):1173-1187.   Published online August 14, 2020												 
													Background/Aims: This study aimed to investigate long-term temporal trends and outcomes of biopsy-proven kidney diseases in a multicenter kidney biopsy cohort, focusing on hypertension and diabetes, the leading causes of end-stage kidney disease (ESKD).
Methods: The study included a total of 21,426..												 |  |  
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											| Hemato-oncology / Original Article											Strong association between herpes simplex virus-1 and chemotherapy-induced oral mucositis in patients with hematologic malignancies Junshik Hong, Hee-Kyung Park, Suhyun Park, Ahreum Lee, Yeon-Hee Lee, Dong-Yeop Shin, Youngil Koh, Ji-Yeob Choi, Sung-Soo Yoon, Youngnim Choi, Inho Kim 
												Korean J Intern Med. 2020;35(5):1188-1198.   Published online September 9, 2019												 
													Background/Aims: A link between oral cavity infections and chemotherapy-induced oral mucositis (CIOM) in patients with hematological malignancies (HMs) undergoing intensive chemotherapy (IC) or hematopoietic stem cell transplantation (HSCT) has been suggested. However, conclusive data are lacking, a..												 |  |  
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											| Hemato-oncology / Original Article											The role of platelet function analyzer-200 in predicting perioperative bleeding risk Eun Sang Yu, Min Ji Jeon, Ka-Won Kang, Byung-Hyun Lee, Eun Joo Kang, Yong Park, Se Ryeon Lee, Hwa Jung Sung, Chul Won Choi, Byung Soo Kim, Dae Sik Kim 
												Korean J Intern Med. 2020;35(5):1199-1209.   Published online February 6, 2020												 
													Background/Aims: Various preoperative screening tests, such as platelet count, prothrombin time, activated partial thromboplastin time, and bleeding time, have been widely used to evaluate the risk of bleeding during surgery. Use of platelet function analyzer (PFA)-100/200 for assessing platelet fun..												 |  |  
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											| Hemato-oncology / Original Article											Cancer incidence according to the National Health Information Database in Korean patients with end-stage renal disease receiving hemodialysis Jisun Myung, Jung Hye Choi, Joo Hark Yi, Inah Kim 
												Korean J Intern Med. 2020;35(5):1210-1219.   Published online February 20, 2020												 
													Background/Aims: The aim of this study was to investigate incidence, survival, and risk factors of cancer in end-stage renal disease (ESRD) patients with hemodialysis using information from the National Health Information Database (NHID).
Methods: Using the NHID, we identified ESRD patients who sta..												 |  |  
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											| Infectious diseases / Original Article											Mediation effect of herpes zoster derived by statin use on cardiovascular disease risk Sung-Han Kim, Sung-Cheol Yun, Young-Ho Khang, Min-Chul Kim, Sun Uck Kwon, Gyung-Min Park, Young-Rak Cho, Kwang Min Lee, Moo Hyun Kim 
												Korean J Intern Med. 2020;35(5):1220-1228.   Published online June 19, 2020												 
													Background/Aims: Although statins are widely used to reduce the risk of cardiovascular disease (CVD) including stroke and myocardial infarction (MI), it is reported that statin use increases the incidence of herpes zoster (HZ) that is associated with increased risk of CVD. So, we evaluated the media..												 |  |  
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											| Allergy / Original Article											N-acetylcysteine decreases airway inflammation and responsiveness in asthma by modulating claudin 18 expression Pureun-Haneul Lee, Jisu Hong, An-Soo Jang 
												Korean J Intern Med. 2020;35(5):1229-1237.   Published online February 28, 2020												 
													Background/Aims: N-acetylcysteine (NAC) affects signaling pathways involved in apoptosis, angiogenesis, cell growth and arrest, redox-regulated gene expression, and the inflammatory response. However, it is not known how the signal mechanism for tight junctional protein claudin (CLDN) 18 is regulate..												 |  |  
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											| Rheumatology / Original Article											Hourly wages of physicians within medical fees based on the Korean relative value unit system Hyun Ah Kim, Sung Hoon Jung, In Young Park, Seong Hun Kang 
												Korean J Intern Med. 2020;35(5):1238-1244.   Published online December 26, 2019												 
													Background/Aims: It is difficult to reach a social agreement on the appropriate level of compensation for professionals. This study was performed to examine the physician fee embedded in the relative value unit (RVU) system in comparison with the Korean hourly minimum wage.
Methods: The Health Insu..												 |  |  
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											| Geriatrics / Original Article											Sarcopenia is associated with severe erectile  dysfunction in older adults: a population-based cohort study Hyungchul Park, Il-Young Jang, Minkyu Han, Heayon Lee, Hee-Won Jung, Eunju Lee, Dae Hyun Kim 
												Korean J Intern Med. 2020;35(5):1245-1253.   Published online April 21, 2020												 
													Background/Aims: Sarcopenia and erectile dysfunction (ED) are associat ed with poor health and quality of life in older men. We investigate the association between sarcopenia and severe ED in community-dwelling older men.
Methods: We prospectively assessed sarcopenia and ED in 519, community-dwelli..												 |  |  | Images of interest |  
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											| Image of interest											Definite visualized communication of a Baker’s cyst with knee joint space and iatrogenic air content in rheumatoid arthritis patient Hong Ki Min, Se Hee Kim, Sung Gyu Moon, Hae-Rim Kim, Sang-Heon Lee 
												Korean J Intern Med. 2020;35(5):1254-1255.   Published online August 19, 2019												 |  |  
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											| Image of interest											Various initial presentations of community onset-hypervirulent K2 serotype Klebsiella pneumoniae in healthy adult Suhyun Oh, Gil Myeong Seong, Miyeon Kim, Keun Hwa Lee, Jeong Rae Yoo 
												Korean J Intern Med. 2020;35(5):1256-1257.   Published online September 27, 2019												 |  |  
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											| Image of interest											Bone remodeling by checkpoint inhibitor Hyeongjong Kim, Woo Kyun Bae 
												Korean J Intern Med. 2020;35(5):1258-1258.   Published online September 26, 2019												 |  |  
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											| Image of interest											Budd-Chiari syndrome presenting with abdominal wall varices Hee Chan Yang, Hyung Ku Chon 
												Korean J Intern Med. 2020;35(5):1259-1260.   Published online December 30, 2019												 |  |  |