De Giorgi A, Contini C, Greco S, Fabbian F, Gasbarro V, Zuliani G, Passaro A, Zenunaj G, Manfredini R (2021) Is venous thromboembolism a predictable marker in older patients with COVID-19 infection? A single-center observational study. J Infect Dev Ctries 15:639–345. doi: 10.3855/jidc.14523