1. Institute of Public Health and Community Medicine Research Center, National Yang-Ming University, Taipei, Taiwan
2. Department of Dentistry, Taipei City Hospital, Taipei, Taiwan
3. Department of Dentistry, School of Dentistry, National Yang-Ming University, Taipei, Taiwan
4. Institute of Oral Biology, School of Dentistry, National Yang-Ming University, Taipei, Taiwan
5. Department of Education and Research, Taipei City Hospital, Taipei, Taiwan
6. Institute of Traditional Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
7. Division of Gastrointestinal Surgery, Department of Surgery, Ren-Ai Branch, Taipei City Hospital, Taipei, Taiwan