Ginting, Samuel, Pitriani ., Juni Mariati Simarmata, and Chaidir Saputra Harahap. “BLOOD GROUP RELATIONSHIP WITH CORONARY HEART DISEASE”. JURNAL KEPERAWATAN DAN FISIOTERAPI (JKF) 4, no. 1 (October 31, 2021): 40–46. Accessed April 30, 2024. https://ejournal.medistra.ac.id/index.php/JKF/article/view/816.