Human osteocyte expression of Nerve Growth Factor: The effect of Pentosan Polysulphate Sodium (PPS) and implications for pain associated with knee osteoarthritis. - Stapledon, Catherine J. M.; Tsangari, Helen; Solomon, Lucian B.; Campbell, David G.; Hurtado, Plinio; Krishnan, Ravi; Atkins, Gerald J. (PLoS ONE, 2019)