de Serres, F., Luisetti, M., Ferrarotti, I., Blanco, I. and Fernández-Bustillo, E. (2005) “Alpha-1 antitrypsin deficiency in Italy: regional differences of the PIS and PIZ deficiency alleles”, Monaldi Archives for Chest Disease, 63(3). doi: 10.4081/monaldi.2005.630.