El-badry, S.A., Omar, S.A., Gad, A.A. and Serwah, A.-H.A. 2023. Could serum serotonin be used as a marker for portal vein invasion in patients with hepatocellular carcinoma?. International journal of health sciences. 6, S7 (Mar. 2023), 7049–7057. DOI:https://doi.org/10.53730/ijhs.v6nS7.14025.