1. Guidelines for infection control in dental health-care settings—2003;Centers for Disease Prevention and Control;MMWR Morb Mortal Wkly Rep,2003
2. Recommended infection control practices for dentistry, 1993;Centers for Disease Prevention and Control;MMWR Morb Mortal Wkly Rep,1993
3. U.S. health work-force personnel factbook;Health Resources and Services Administration,2000
4. Recommended infection control practices for dentistry;Centers for Disease Control;MMWR Morb Mortal Wkly Rep,1986