1. Department of Pathology II, Kansai Medical University, 2-5-1 Shin-machi, Hirakata, Osaka 573-1010, Japan.
2. Department of Public Health, Faculty of Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
3. Division of Pathology, Kansai Medical University Takii Hospital, 10-15 Fumizono, Moriguchi, Osaka 570-8507, Japan.
4. Institute for Health Care Science, Suntory Wellness Ltd., 1-1-1 Wakayamadai, Shimamoto, Osaka 618-8503, Japan.