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Takahashi T, et al. Evaluation of the efficacy and safety of long-term intake of a dietary supplement containing salmon nasal cartilage-derived proteoglycan on subjects with subjective knee symptoms: an open study. Yakuri to Chiryo. 2018;46:1693-1706. URL

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Kakizaki I, Mineta T, Sasaki M, et al. Biochemical and atomic force microscopic characterization of salmon nasal cartilage proteoglycan. Carbohydr Polym. 2014;103:538-549. DOI