Cohort profile: the 45 and up study. by Banks, E, Redman, S, Jorm, L, Armstrong, B, Bauman, A, Beard, J, Beral, V, Byles, J, Corbett, S, Cumming, R, Harris, M, Sitas, F, Smith, W, Taylor, L, Wutzke, S, Lujic, S