Utility of the Serum Protein Electrophoresis in the Opportunistic Screening for the Deficiency of Alpha-1 Antitrypsin oleh Beatriz Fernández-Gomez, Sebastian Menao-Guillén, Ayla Fernandez Gonzalez, Maria Arruebo Muñio, Monica Ramos Alvarez, Mercedes Inda Landaluce, Maria Angeles Castillo Arce, Miguel Ángel Torralba-Cabeza