1. Division of Molecular and Clinical Epidemiology; Aichi Cancer Centre Research Institute; Nagoya Japan
2. Division of Haematology; Saitama Medical Centre; Jichi Medical University; Saitama Japan
3. Department of Epidemiology; Nagoya University Graduate School of Medicine; Nagoya Japan
4. Epidemiology and Prevention Group; Centre for Public Health Sciences; National Cancer Centre; Tokyo Japan
5. Graduate School of Medicine; The University of Tokyo; Tokyo Japan