1. Department of Internal Medicine, International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea.
2. Department of Dermatology/Atopy and Asthma Center & Seoul Medical Research Institute, Seoul Medical Center, Seoul, Korea.
3. Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.