Contoli, Benedetta, et al. “PASSI d’Argento (Silver Steps): The Main Features of the New Nationwide Surveillance System for the Ageing Italian Population, Italy 2013-2014”. Annali dell’Istituto Superiore Di Sanità, vol. 52, no. 4, Nov. 2017, pp. 536-42, https://annali.iss.it/index.php/anna/article/view/342.