1. Division of Cancer-Related Genes, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan, Geriatric Stomatology, Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo,
Japan
2. Division of Cancer-Related Genes, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
3. Geriatric Stomatology, Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
4. Oral Diagnosis and Oral Medicine, Department of Oral Pathobiological Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan