Vanacore, Nicola, et al. “Amyotrophic Lateral Sclerosis and Soccer: An Internet Survey of 29 Italian Players”. Annali dell’Istituto Superiore Di Sanità, vol. 54, no. 4, Dec. 2018, pp. 364-9, https://annali.iss.it/index.php/anna/article/view/738.