1. Department of Internal Medicine, Jeju National University School of Medicine, Jeju, Korea.
2. The Environmental Health Center (Atopic dermatitis & Allergic rhinitis), Jeju National University School of Medicine, Jeju, Korea.
3. Department of Microbiology, Jeju National University School of Medicine, Jeju, Korea.
4. Department of Preventive Medicine, Jeju National University School of Medicine, Jeju, Korea.
5. Department of Otorhinolaryngology, Jeju National University School of Medicine, Jeju, Korea.