1. Departments of Dermatology; Shimane Medical University; 89-1 Enya-cho Izumo 693 Japan
2. Oral and Maxillofacial Surgery; Shimane Medical University; 89-1 Enya-cho Izumo 693 Japan
3. Department of Dermatology, Medical School; Osaka City University; 1-4-54 Asahi-machi, Abeno-ku Osaka 545 Japan
4. Second Department of Dermatology; Toho University School of Medicine; 2-17-6 Ohashi Meguro-ku Tokyo 153 Japan