1. Division of Medical Statistics and Bioinformatics, Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan;
2. Department of Oral Hygiene, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan;
3. Health Promotion Administration, Ministry of Health and Welfare, Taipei, Taiwan;
4. School of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan;
5. National Institute of Cancer Research, National Health Research Institutes, Tainan, Taiwan