Keats, M. R., Cui, Y., DeClercq, V., Dummer, T. J., Forbes, C., Grandy, S. A., …Parker, L. (2017). Multimorbidity in Atlantic Canada and association with low levels of physical activity. Preventive Medicine, 105, 326-331. https://doi.org/10.1016/j.ypmed.2017.10.013