1. Department of Dermatology, Taipei Medical University–Shuang Ho Hospital, Taipei 235, Taiwan.
2. Graduate Institute of Clinical Medicine, Taipei Medical University, Taipei 110, Taiwan.
3. Graduate Institute of Medical Sciences, Taipei Medical University, Taipei 110, Taiwan.
4. Pharmaceutics Laboratory, Graduate Institute of Natural Products, Chang Gung University, Kweishan, Taoyuan 333, Taiwan.
5. Department of Traditional Chinese Medicine, Center for Traditional Chinese Medicine, Chang Gung Memorial Hospital, Keelung 204, Taiwan.