Roddy, E., Ogollah, R., Oppong, R., Zwierska, I., Datta, P., Hall, A., …Foster, N. (2020). Optimising outcomes of exercise and corticosteroid injection in patients with subacromial pain (impingement) syndrome: a factorial randomised trial. British Journal of Sports Medicine, 55(5), https://doi.org/10.1136/bjsports-2019-101268