Rzewuska, M., Mallen, C. D., Strauss, V. Y., Belcher, J., & Peat, G. (2015). One-year trajectories of depression and anxiety symptoms in older patients presenting in general practice with musculoskeletal pain: A latent class growth analysis. Journal of Psychosomatic Research, 79(3), 195 - 201. https://doi.org/10.1016/j.jpsychores.2015.05.016