1. Department of Public Health, Japan
2. Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio, USA
3. Division of Epidemiology and Prevention, Aichi Cancer Center Research Institute, Japan
4. Department of Pathology, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
5. Biology Division, National Cancer Center Research Institute, Tokyo; Cleveland, Ohio, USA