1. Department of Medicine, Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Department of Dermatology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
3. Department of Medical Device Management & Research, Samsung Advanced Institute for Health Sciences & Technology (SAIHST), Sungkyunkwan University, Seoul, Korea.
4. Department of Applied Statistics, Konkuk University, Seoul, Korea.