The world of CAM is vast (estimates count thousands
of therapies and products from many systems
of care; see http://nccam.nih.gov/health/whatiscam),
and the collection of research evidence supporting
the effectiveness and safety of CAM therapies for the management of OA is in its infancy. The National Center for Complementary and Alternative Medicine
(NCCAM) has categorized CAM therapies as mind–
body therapies, natural products, manipulative and
body-based approaches, and other practices, including energy therapies.
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