Contribution of chronic conditions to smoking differences in life expectancy with and without disability in Belgium, Yokota, Renata T. C., Nusselder Willma J., Robine Jean-Marie, Tafforeau Jean, Charafeddine Rana, Gisle Lydia, Deboosere Patrick, and Van Oyen Herman , European Journal of Public Health, Dec-06-2018, Volume 28, Issue 5, (2018)