Luthfi Aidil Rizal Lubis, and M. F. . Siregar. “Characteristics of Breast Cancer Patients Undergoing Radiotherapy at the H. Adam Malik Central General Hospital Medan in 2020-2021”. Sumatera Medical Journal, vol. 8, no. 3, Sept. 2025, pp. 129-33, doi:10.32734/sumej.v8i3.10951.