1. Defining the burden of skin disease in the United States—a historical perspective;Johnson;J Investig Dermatol Symp Proc,2004
2. Which medical conditions account for the rise in health care spending?;Thorpe;Health Aff (Millwood),2004
3. The Lewin Group, I. (2005). The burden of skin diseases. Available at: http://www.lewin.com/content/publications/april2005skindisease.pdf. Accessed September 23, 2011.
4. Schofield, JK, Grindley, D, Williams, HC. (n.d.). Skin conditions in the UK: a health care needs assessment. University of Nottingham: Centre of Evidenced Based Dermatology. Available at: http://www.nottingham.ac.uk/scs/documents/documentsdivisions/documentsdermatology/hcnaskinconditionsuk2009.pdf. Accessed September 23, 2011.
5. Williams HC. (n.d.). Dermatology. In: Stevens A, Raftery J, editors. Health Care Needs Assessment (ST - Dermatology). Oxford (United Kingdom): Radcliffe Medical Press; 2007. p. 261–348.