1. Department of Dermatology, School of Medicine, Chungnam National University, Daejeon, Korea.
2. Department of Internal Medicine, School of Medicine, Chungnam National University, Daejeon, Korea.
3. Department of Dermatology, Rutgers Robert Wood Johnson Medical School, Somerset, NJ, United States.
4. Department of Dermatology, Weill Cornell Medical Center, New York, NY, United States.