Mandolesi, Sandro, et al. “Venous Compression Syndrome of Internal Jugular Veins Prevalence in Patients With Multiple Sclerosis and Chronic Cerebro-Spinal Venous Insufficiency”. Annali Italiani Di Chirurgia, vol. 87, no. 5, Sept. 2016, pp. 406-10, https://annaliitalianidichirurgia.it/index.php/aic/article/view/2003.