Hopewell, Sally, Keene, David J., Maia Schlüssel, Michael, Dritsaki, Melina, Dutton, Susan, Carr, Andrew, Hamilton, William, Hansen, Zara, Jaggi, Anju, Littlewood, Chris, Soutakbar, Hessam, Heine, Peter, Cureton, Lucy, Barker, Karen, Lamb, Sarah E., "Clinical and cost-effectiveness of progressive exercise compared with best practice advice, with or without corticosteroid injection, for the treatment of rotator cuff disorders: Protocol for a 2x2 factorial randomised controlled trial (the GRASP trial)", BMJ Open, 2017