Simpson ER (2003). “Sources of estrogen and their importance”. The Journal of Steroid Biochemistry and Molecular Biology. 86 (3–5): 225–30. doi:10.1016/S0960-0760(03)00360-1. PMID14623515.
drugs.com
Drugs.com: Chuyên khảo for letrozole. It is also used for ovarian cancer patients after they have completed chemotherapy.
Simpson ER (2003). “Sources of estrogen and their importance”. The Journal of Steroid Biochemistry and Molecular Biology. 86 (3–5): 225–30. doi:10.1016/S0960-0760(03)00360-1. PMID14623515.
