1. Department of Microbiology, School of Pharmacy, Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
2. Takamatsu Dermatological Research Group, 4-1-3 Banchou, Takamatsu, Kagawa 760-0017, Japan
3. Department of Dermatology, Takamatsu Red Cross Hospital, 4-1-3 Banchou, Takamatsu, Kagawa 760-0017, Japan