Efficacy and cost-effectiveness of Stem Cell injections for symptomatic relief and strUctural improvement in people with Tibiofemoral knee OsteoaRthritis: protocol for a randomised... oleh Leticia A Deveza, Win Min Oo, David J Hunter, Stefan Lohmander, Xia Wang, Changhai Ding, Felix Eckstein, Wolfgang Wirth, Anthony Harris, Xiaoqian Liu, Sarah Robbins, Sonika Virk, Benny Antony, David Humphries, Christopher Little, James Linklater, Gillian Heller, Karen Schuck, Kirsty Carmichael, R O'Connell, Thomas Buttel