Cadar, D., Abell, J., Matthews, F. E., Brayne, C., David Batty, G., Llewellyn, D. J., & Steptoe, A. (2021). Cohort Profile Update: The Harmonised Cognitive Assessment Protocol Sub-study of the English Longitudinal Study of Ageing (ELSA-HCAP). International Journal of Epidemiology, 50(3), 725-726I. https://doi.org/10.1093/ije/dyaa227