1. Department of Biochemistry, Sapporo Medical University School of Medicine , S1W17, Chuo-ku, Sapporo 060-8556 , Japan
2. Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine , S1W17, Chuo-ku, Sapporo 060-8556 , Japan
3. Department of Chemistry, Sapporo Medical University Center for Medical Education , S1W17, Chuo-ku, Sapporo 060-8556 , Japan