CAM is a group of diverse medical and health care systems, practices, and products that are not generally considered part of conventional medicine. Complementary medicine is used together with conventional medicine, and alternative medicine is used in place of conventional medicine. Integrative medicine combines conventional and CAM treatments for which there is evidence of safety and effectiveness.

Barnes PM, Bloom B, Nahin R. CDC National Health Statistics Report #12 - NCCAM/NIH

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