1. Departments of Microbiology
2. Hokkaido Wako Junyaku Co., Ltd., Kita-ku, Sapporo 001-0015
3. Sapporo Clinical Laboratory, Inc., Chuo-ku, Sapporo 060-0005
4. SRL Hokkaido, Inc., Chuo-ku, Sapporo 064-0919
5. Laboratory Medicine, Hokkaido University Medical Hospital, Kita-ku, Sapporo 060-8648, Japan
6. Otolaryngology, Sapporo Medical University School of Medicine, Chuo-ku, Sapporo 060-8556