“Correlation between Obesity and Contraceptive Method on Estrogen and Progesterone Receptors and Human Epidermal Growth Factor Receptor–2 Expression among Breast Cancer Patients in Dr. Moewardi Hospital, Surakarta”, INDONES J MED, vol. 4, no. 3, pp. 259–265, May 2019, doi: 10.26911/theijmed.2019.4.3.204.