Reference:
1. Collagen: An implausible supplement for joint pain [Online: http://www.sciencebasedmedicine.org/collagen-an-implausible-supplement-for-joint-pain/] cited on July 26, 2013.
2. Ragle R.L. and Sawitzke A.D. (2012) Nutraceuticals in the Management of Osteoarthritis. Drugs Aging. 29:717–731.
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