Signorelli, Carlo, Anna Odone, Alessia Miduri, Paola Cella, Cesira Pasquarella, Armando Gozzini, Pasquale Tamburrino, and Enrico Castellacci. 2016. “Flu Vaccination in Elite Athletes: A Survey Among Serie A Soccer Teams”. Acta Biomedica Atenei Parmensis 87 (2): 117-20. https://mattioli1885journals.com/index.php/actabiomedica/article/view/5598.