Covid-19 pandemic impact on mental health: a web-based cross-sectional survey on a sample of Italian general practitioners - Amerio, A; Bianchi, D; Santi, F; Costantini, L; Odone, A; Signorelli, C; Costanza, A; Serafini, G; Amore, M; Aguglia, A (Acta Biomed, 2020)