Health expectancies in the European Union: same concept, different methods, different results, Santos, João Vasco, Viana João, Devleesschauwer Brecht, Haagsma Juanita A., Santos Cristina Costa, Ricciardi Walter, and Freitas Alberto , Journal of Epidemiology and Community Health, Sep-08-2021, Volume 75, Issue 8, (2021)