SIRT1 regulation of apoptosis of human chondrocytes - Takayama, K; Ishida, K; Matsushita, T; Fujita, N; Hayashi, S; Sasaki, K; Tei, K; Kubo, S; Matsumoto, T; Fujioka, H; Kurosaka, M; Kuroda, R (Arthritis Rheum, 2009)