1. American Academy of Pediatric Dentistry(2006).Guideline for Monitoring and Management of Pediatric Patients During and after Sedation for Diagnostic and Therapeutic Procedures.http://www.aapd.org/media/policies_guidelines/G_Sedation.pdf.
2. American Dental Association(2007).Guidelines for the Use of Sedation and General Anesthesia by Dentists.http://www.ada.org/sections/about/pdfs/statements_anesthesia.pdf.
3. American Society of Anesthesiologists(2011).ASA Physical Status Classification System.http://www.asahq.org.
4. Long‐term effects of two different treatments for dental fear and avoidance;Berggren Ulf;Journal of Dental Research,1986