1. Department of Dermatology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul 06974, Korea.
2. Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea.
3. The Center for Epidemic Preparedness, KAIST Institute, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea.