Varghese, A., M. L. Abraham, R. Ramachandran, and S. Thomas. “A Prospective Study on the Relationship Between Blood Pressure and Blood Group Among Adult Male Blood Donors in a Tertiary Care Center”. International Journal of Clinical and Experimental Physiology, Vol. 2, no. 1, Jan. 2015, pp. 51-55, https://ijcep.org/index.php/ijcep/article/view/44.