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Extracellular nicotinamide phosphoribosyltransferase (NAMPT/visfatin) inhibits insulin-like growth factor-1 signaling and proteoglycan synthesis in human articular chondrocytes

Raghunatha R Yammani* and Richard F Loeser

Arthritis Research & Therapy 2012, 14:R23  doi:10.1186/ar3705

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