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Fig. 6. —Plot of delayed gadolinium-enhanced MRI of cartilage (dGEMRIC) index values for glycosaminoglycan distribution (T1_Gd) in 10 volunteers who were followed for 6 months while taking glucosamine and chondroitin sulfate supplements (CosaminDS, Nutramax Laboratories, Edgewood, MD). Stars denote significant (p < 0.05) changes over 6-month period (two volunteers with increased values, and one with decreased values).