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WikiPedia: Keratan sulfat http://www.wheelessonline.com/ortho/Chondroitin_an... http://www3.interscience.wiley.com/resolve/openurl... http://adsabs.harvard.edu/abs/1958Sci...128..896M http://adsabs.harvard.edu/abs/2006NYASA1086...81Z //www.ncbi.nlm.nih.gov/pmc/articles/PMC1149539 //www.ncbi.nlm.nih.gov/pmc/articles/PMC2877919 //www.ncbi.nlm.nih.gov/pubmed/11030741 //www.ncbi.nlm.nih.gov/pubmed/12933807 //www.ncbi.nlm.nih.gov/pubmed/13129238 //www.ncbi.nlm.nih.gov/pubmed/13592269