Salvatore, M., G. Floridia, A. Amato, F. Censi, M. C. de Stefano, G. Ferrari, F. Tosto, D. Taruscio, and I. E.-S. Working Group. “Italian External Quality Assessment Program for Cystic Fibrosis Sweat Chloride Test: A 2015 and 2016 Results Comparison”. Annali dell’Istituto Superiore Di Sanità, vol. 53, no. 4, Dec. 2017, pp. 305-13, https://annali.iss.it/index.php/anna/article/view/593.