Farid, Amir M., et al. “Serum Serotonin and Noninvasive Portal Hypertension Indices in Relation to Esophageal Variceal Severity in Cirrhosis: An Exploratory Cross-Sectional Study”. Journal of Clinical Medicine Research, vol. 18, no. 11, Jan. 2026, pp. 823-34, https://doi.org/10.14740/jocmr6742.