Ahrens, P., Baldwick, C., Bidwai, A., Butt, A., Candal-Couto, J., Crowther, M., …Toye, F. (2020). Management of adults with primary frozen shoulder in secondary care (UK FROST): a multicentre, pragmatic, three-arm, superiority randomised clinical trial. Lancet, 396(10256), 977-989. https://doi.org/10.1016/S0140-6736%2820%2931965-6