1. Pathology Division; Yamanashi Prefectural Central Hospital; Kofu Japan
2. Oral Surgery Division; Yamanashi Prefectural Central Hospital; Kofu Japan
3. Department of Oral Pathology; Osaka Dental University; Hirakata Japan
4. Division of Oral Pathology; Department of Tissue Regeneration and Reconstruction, Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan