Magnitude and time-course of excess mortality during COVID-19 outbreak: population-based empirical evidence from highly impacted provinces in northern Italy oleh Sara Conti, Pietro Ferrara, Giampiero Mazzaglia, Marco I. D'Orso, Roberta Ciampichini, Carla Fornari, Fabiana Madotto, Michele Magoni, Giuseppe Sampietro, Andrea Silenzi, Claudio V. Sileo, Alberto Zucchi, Giancarlo Cesana, Lamberto Manzoli, Lorenzo G. Mantovani