1. Department of Agricultural Chemistry; The University of Tokyo; Yayoi 1-1 Bunkyo-ku Tokyo 113 Japan
2. Division of Child Neurology, Institute of Neurological Sciences; Tottori University School of Medicine; 86 Nishimachi Yonago 683 Japan
3. Department of Dermatology, Faculty of Medicine; The University of Tokyo; Hongo 5 Bunkyo-ku Tokyo 113 Japan