Rao, Parul, Ravikant Ravikant, Srishti Soni, and Davendra Kumar Singh. “To Study the Estrogen (ER) and Progesterone (PR) Receptor in Case of Primary and Metastatic Breast Cancer”. International journal of health sciences 6, no. S8 (August 5, 2022): 1827–1832. Accessed May 17, 2025. https://sciencescholar.us/journal/index.php/ijhs/article/view/11577.