“An investigation on ABO and Rh blood groups and HBsAg, anti-HIV, VDRL positivity ”, Ann Med Res , vol. 4, no. 2, pp. 0139–0142, May 2021, Accessed: May 09, 2025. [Online]. Available: http://www.annalsmedres.org/index.php/aomr/article/view/2609