1. Center for Systems Science and Engineering (CSSE). COVID-19 Map—Johns Hopkins Coronavirus Resource Center. 2020. https://coronavirus.jhu.edu/map.html (accessed 4 Apr 2020).
2. An interactive web-based dashboard to track COVID-19 in real time;E Dong;Lancet Infect Dis,2020
3. Monitoring Transmissibility and Mortality of COVID-19 in Europe;J Yuan;Int J Infect Dis,2020
4. The reproductive number of COVID-19 is higher compared to SARS coronavirus;Y Liu;J Travel Med,2020
5. COVID-19 in Europe: the Italian lesson;A Saglietto;Lancet,2020