Bhattarai, Subash, et al. “Study of Portal Vein Diameter and Spleen Size by Ultrasonography and Their Association With Gastro-Esophageal Varices”. Nepalese Journal of Radiology, vol. 4, no. 2, Oct. 2017, pp. 6-14, doi:10.3126/njr.v4i2.18482.