Foster, N., Nicholls, E., Holden, M., Healey, E., Tooth, S., & Hay, E. (2015). Improving the effectiveness of exercise therapy for older adults with knee pain: a pragmatic randomised controlled trial (the beep trial). Physiotherapy, 101(S1), e404-e405. https://doi.org/10.1016/j.physio.2015.03.633