David F. Foster

Long-Term Trends in the Use of Complementary and Alternative Medical Therapies in the United States

E. Walters, T. Kaptchuk, M. V. Van Rompay, 2001, Annals of Internal Medicine.

Alternative Medicine Use in Older Americans

R. Phillips, D. Eisenberg, M. Hamel, 2000, Journal of the American Geriatrics Society.

The use of complementary and alternative therapies to treat anxiety and depression in the United States.

R. Kessler, R. B. Davis, J. Soukup, 2001, The American journal of psychiatry.