Valecchi, D., Bacci, D., Gulisano, M., Sgambati, E., Sibilio, M., Lipoma, M. and Macchi, C. (2010) “Internal jugular vein valves: an assessment of prevalence, morphology and competence by Color Doppler Echography in 240 healthy subjects”, Italian Journal of Anatomy and Embryology, 115(3), pp. 185–189. Available at: https://oajournals.fupress.net/index.php/ijae/article/view/1079 (Accessed: 3 May 2024).