1. Department of Dermatology, College of Medicine, Chung‑Ang University, Seoul 06973, Republic of Korea
2. Research and Development Center, Green Cross WellBeing Corporation, Seongnam, Gyeonggi 13595, Republic of Korea
3. Fort Hays State University, Hays, KS 67601, USA
4. Division of Gastroenterology, Department of Internal Medicine, Bucheon St.�Mary's Hospital, The Catholic University of Korea, Bucheon‑si, Gyeonggi 14647, Republic of Korea