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Williamson AK, Masuda K, Thonar EJ, Sah RL (2003) Growth of immature articular cartilage in vitro: correlated variation in tensile biomechanical and collagen network properties. Tissue Eng 9: 625–634. PLoS ONE | www.plosone.org 7 October 2011 | Volume 6 | Issue 10 | e26178