1 Department of Radiology, Seoul National University College of Medicine, Seoul, South Korea.
2 Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, South Korea; Department of Internal Medicine, Seoul National University Hospital, Seoul, South Korea.
3 Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, South Korea; Department of Internal Medicine, Seoul National University Hospital, Seoul, South Korea; Drug Safety Monitoring Center, Seoul National University Hospital, Seoul, South Korea. Electronic address: helenmed@snu.ac.kr.