1. Department of Dermatology, Armed Forces Ildong Hospital, Pocheon, Korea.
2. Department of Preventive Medicine, Armed Forces Ildong Hospital, Pocheon, Korea.
3. Department of Dermatology, Armed Forces Yangju Hospital, Yangju, Korea.
4. Department of Dermatology, Armed Forces Goyang Hospital, Goyang, Korea.
5. Department of Dermatology, Korea Army Academy at Yeong-Cheon Station Hospital, Yeongcheon, Korea.
6. Department of Dermatology, Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.