Torres C, Hogan M, Patro S, Chakraborty S, Nguyen T, Thornhill R, Freedman M, Bussiere M, Dabirzadeh H, Schwarz BA, Belanger S, Legault-Kingstone L, Schweitzer M, Lum C. Extracranial Venous abnormalities: A true pathological finding in patients with multiple sclerosis or an anatomical variant? Eur Radiol. 2017 Jan; 27(1):239-246.