Five-year outcome of characterized chondrocyte implantation versus microfracture for symptomatic cartilage defects of the knee: early treatment matters - Vanlauwe, J; Saris, D BF; Victor, J; Almqvist, K F; Bellemans, J; Luyten, F PTIG/ACT/01/2000&EXT Study Group (Am J Sports Med, 2011)
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