http://www.nlm.nih.gov/nccam/camonpubmed.html
National Center for Complementary and Alternative Medicine, National Institutes of Health
CAM is a subset of a larger medical literature database (PubMed) that provides free access to CAM sources of information -- over 220,000 journal citations directly related to complementary and alternative medicine. CAM on PubMed is a joint venture of the National Center for Complementary and Alternative Medicine (NCCAM) and the National Library of Medicine (NLM). The database is intended for use by health professionals, CAM practitioners, researchers, educators, and consumers.