Carter TE, Taylor KA, Spritzed CE, Utturkar GM, Taylor DC, Moorman CT, Garrett WE, Guilak F, McNulty AM, DeFrate LE. In vivo cartilage strain increases following medial meniscal tear and correlates with synovial fluid matrix metalloproteinase activity. J Biomech 2015 Jun 1;48(8):1461-8.