Ginting, S., P. ., J. M. Simarmata, and C. S. Harahap. “BLOOD GROUP RELATIONSHIP WITH CORONARY HEART DISEASE”. JURNAL KEPERAWATAN DAN FISIOTERAPI (JKF), vol. 4, no. 1, Oct. 2021, pp. 40-46, doi:10.35451/jkf.v4i1.816.