Utility of the serum protein electrophoresis in the opportunistic screening for the deficiency of Alpha-1 Antitrypsin Fernández-Gomez Beatriz Menao-Guillén Sebastian Universidad de Zaragoza Fernandez Gonzalez Ayla Arruebo Muñio Maria Ramos Alvarez Monica Universidad de Zaragoza Inda Landaluce Mercedes Castillo Arce Maria Angeles Torralba-Cabeza Miguel Ángel Universidad de Zaragoza 2023 research-article