K. Rakhmadian, Yopi Triputra, and Aulia Rahman, “Relationship between Breast Cancer Subtypes and Serum CA 15-3 Levels with the Incidence of Pleural Effusion in Breast Cancer Patients at Dr. M. Djamil General Hospital, Padang, Indonesia”, Bioscmed, vol. 7, no. 6, pp. 3345-3350, Jul. 2023.