Seborrheic keratosis. American Academy of Dermatology website. Available at:
http://www.aad.org/dermatology-a-to-z/diseases-and-treatments/q---t/sebhorrheic-keratoses. Accessed June 4, 2013.
American Osteopathic College of Dermatology website. Available at:
http://www.aocd.org/skin/dermatologic%5Fdiseases/seborrheic%5Fkeratos.html. Accessed June 4, 2013.
Seborrheic keratosis. EBSCO DynaMed website. Available at:
https://dynamed.ebscohost.com/about/about-us. Updated May 14, 2013. Accessed June 4, 2013.
American Academy of Dermatology
American Academy of Family Physicians
Canadian Dermatology Association