1. Eisenberg DM, Kessler RC, Foster C, Norlock FE, Calkins DR, Delbanco TL: Unconventional medicine in the United States. Prevalence, costs, and patterns of use. N Engl J Med. 1993, 328: 246-252. 10.1056/NEJM199301283280406.
2. Eisenberg DM, Davis RB, Ettner SL, Appel S, Wilkey S, Van Rompay M, Kessler RC: Trends in alternative medicine use in the United States, 1990–1997: results of a follow-up national survey. JAMA. 1998, 280: 1569-1575. 10.1001/jama.280.18.1569.
3. Barnes PM, Powell-Griner E, McFann K, Nahin RL: Complementary and alternative medicine use among adults: United States, 2002. Adv Data. 2004, 1-19.
4. Tindle HA, Davis RB, Phillips RS, Eisenberg DM: Trends in use of complementary and alternative medicine by US adults: 1997–2002. Altern Ther Health Med. 2005, 11: 42-49.
5. Bell RA, Suerken CK, Grzywacz JG, Lang W, Quandt SA, Arcury TA: Complementary and alternative medicine use among adults with diabetes in the United States. Altern Ther Health Med. 2006, 12: 16-22.