Clinical and cost-effectiveness of Knee Arthroplasty versus Joint Distraction for Osteoarthritis (KARDS): protocol for a multicentre, phase III, randomised control trial oleh Deborah D Stocken, Dennis G McGonagle, David Murray, Catherine Reynolds, Catherine Fernandez, David R Ellard, Andrew Metcalfe, Hemant Sharma, Paul Harwood, Hamish Simpson, Hemant Pandit, Susanne Arnold, Cerys Joyce Tassinari, Ruchi Higham, Isabelle Louise Smith, Ruben Mujica-Mota, Thomas William Hamilton, Julie Croft