Khoman, E., Mitchell J. and Weale, M. (2008) ‘Incidence-based estimates of life expectancy of the healthy for the UK: coherence between transition probabilities and aggregate life-tables’, Journal of the Royal Statistical Society, Series A (Statistics in Society), 171, 1, pp. 203-222, 10.1111/j.1467-985X.2007.00497.x