People living with undiagnosed HIV infection and a low CD4 count: estimates from surveillance data, Italy, 2012 to 2014 Regine, Vincenza and Dorrucci, Maria and Pezzotti, Patrizio and Mammone, Alessia and Quinten, Chantal and Pharris, Anastasia and Suligoi, Barbara and the regional representatives of the National HIV Surveillance System, Eurosurveillance, 23, 17-00240 (2018), https://doi.org/10.2807/1560-7917.ES.2018.23.15.17-00240