1. PHD Dermatology Clinic, Seoul, Korea.
2. Department of Dermatology, University of Ulsan College of Medicine, Ulsan, Korea.
3. Department of Dermatology, Seoul National University College of Medicine and Institute of Human-Environment Interface Biology, Seoul National University Medical Research Center, Laboratory of Cutaneous Aging and Hair Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea.
4. Department of Dermatology, Hallym University College of Medicine, Chuncheon, Korea.
5. Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea.
6. Department of Dermatology, College of Medicine, The Catholic University of Korea, Seoul, Korea.