American Academy of Orofacial Pain, "Sinus/Nasal Toothache," http://aaop.avenet.net/index.asp?Type=B_BASIC&SEC=%7B2B365BAE-7FEA-40EB-9A9C-B55AC5DBD6E5%7D (accessed February 10, 2010)

American Rhinologic Society, "Why Do We Have Sinuses?" http://www.american-rhinologic.org/patientinfo.purposeofsinuses.phtml (accessed February 10, 2010)

Columbia University College of Dental Medicine, "Respiratory Disease and Conditions," http://www.simplestepsdental.com/SS/ihtSS/r.WSIHW000/st.31848/t.32264/pr.3.html (accessed February 10, 2010)

Massachusetts Dental Society, "Cures for the Common Cold For Your Teeth," http://www.massdental.org/?id=3312 (accessed February 10, 2010)

Merck Manuals Online Medical Encyclopedia, "Sinusitis: Nose, Sinus and Taste Disorders," http://www.merck.com/mmhe/sec19/ch221/ch221i.html (accessed February 11, 2010)

Penn State University, "A to Z Health and Disease Information: Sinusitis," http://www.hmc.psu.edu/healthinfo/s/sinusitis.htm (accessed February 10, 2010)

University of Maryland, "Sinusitis - All Information," http://www.umm.edu/ency/article/000647all.htm (accessed February 10, 2010)