BMC Public Health BMC Public Health The definition of immigrant status matters: Impact of nationality, country of origin, and length of stay in host country on mortality estimates Gimeno-Feliu L.A. Universidad de Zaragoza Calderón-Larrañaga A. DÍaz E. Laguna-Berna C. Poblador-Plou B. Coscollar-Santaliestra C. Prados-Torres A. 2019 research-article