1Department of Internal Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Republic of Korea.
2Department of Internal Medicine, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Republic of Korea.
3Department of Internal Medicine, Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea.
4Lunit, Seoul, Republic of Korea.
5Department of Pulmonary, Allergy and Critical Care Medicine, Kyung Hee University Hospital at Gangdong, College of Medicine, Kyung Hee University, Seoul, Republic of Korea.
6Division of Allergy, Department of Internal Medicine, Seoul Medical Center, Seoul, Republic of Korea.
7Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
8Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea.
9Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Republic of Korea.
10Division of Allergy, Department of Internal Medicine, Seoul St Mary's Hospital, College of Medicine, the Catholic University of Korea, Seoul, Republic of Korea.
11Department of Internal Medicine, School of Medicine, Pusan National University, Busan, Republic of Korea.
12Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, Republic of Korea.
13Division of Respiratory Medicine and Allergy, Department of Internal Medicine, Jeonbuk National University Medical School, Jeonju, Republic of Korea.
14Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea.
15Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Republic of Korea.
16Division of Allergy, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
17Centre for Human and Applied Physiological Sciences, King's College London, London, UK.
18Department of Allergy and Clinical Immunology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.