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Effect of a natural extract of chicken combs with a high content of hyaluronic acid (Hyal-Joint®) on pain relief and quality of life in subjects with knee osteoarthritis: a pilot randomized double-blind placebo-controlled trial

Douglas S Kalman*, Maria Heimer, Anita Valdeon, Howard Schwartz and Eric Sheldon

Nutrition Journal 2008, 7:3  doi:10.1186/1475-2891-7-3

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