[1] Kagoshima Univ, Grad Sch Med & Dental Sci, Dept Epidemiol, Kagoshima 8908544, Japan
[2] Kagoshima Univ, Grad Sch Med & Dental Sci, Dept Prevent Med, Kagoshima 8908544, Japan
[3] Kagoshima Univ, Grad Sch Med & Dental Sci, Dept Human Pathol, Kagoshima 8908544, Japan
[4] Kagoshima Univ, Grad Sch Med & Dental Sci, Ctr Chron Viral Dis, Div Oncogen & Persistent Viruses, Kagoshima 8908544, Japan
[5] Kagoshima City Hosp, Dept Pathol, Kagoshima 8928580, Japan