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Kyoung-Hee Sohn,1 Myung-Nam Lee,2 Da Woon Sim,3 Sujeong Kim,4 You Sook Cho,5 Hyouk-Soo Kwon,5 Sang-Heon Kim6 1Division of Pulmonology and Allergy, Department of Internal Medicine, Kyung Hee University Hospital, Seoul, South Korea; 2Department of Nursing, College of Health Science, Kangwon National University Samcheok, Samcheok-si, Gangwon-do, South Korea; 3Department of Allergy and Clinical Immunology, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, South Korea; 4Division of Allergy and Clinical Immunology, Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, South Korea; 5Department of Allergy and Clinical Immunology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea; 6Division of Pulmonary Medicine and Allergy, Department of Internal Medicine, Hanyang University College of Medicine, Seoul, South KoreaCorrespondence: Hyouk-Soo Kwon, Department of Allergy and Clinical Immunology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Korea, Email kwonhs21@naver.com Sang-Heon Kim, Division of Pulmonary Medicine and Allergy, Department of Internal Medicine, Hanyang University Hospital, Hanyang University College of Medicine, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Korea, Email sangheonkim@hanyang.ac.kr