de Stefano, M. C.; Floridia, G.; Censi, F.; Tosto, F.; Salvatore, M.; Civolani, A.; Crescenzi, B.; Giardino, D.; Lenzini, E.; Lisi, E. The Italian National External Quality Assessment Program in Cytogenetics: 4 Years of Activity (2013-2016) Following the Introduction of Poor Performance Criteria. Ann Ist Super Sanità 2018, 54, 109-116.