1. National Center for Compliementary and Alternative Medicine What is complementary and alternative medicine? http://nccam.nih.gov/health/whatiscam/#definingcam
2. Complementary and alternative medicine use among adults and children: United States, 2007;Barnes;Natl Health Stat Rep,2008
3. Centers for Medicare and Medicaid Services National Health Expenditures Aggregate, Per Capita Amounts, Percent Distribution, and Average Annual Percent Change: Selected Calendar Years 1960-2010 https://www.cms.gov/NationalHealthExpendData/downloads/tables.pdf
4. Alternative mind-body therapies used by adults with medical conditions;Bertisch;J Psychosom Res,2009
5. Complementary and alternative medicine use among US adults with common neurological conditions;Wells;J Neurol,2010