Muhammad Arif Khan, Saira Afzal, Hassan Saeed, Hnia Usman, Rooqash Ali, Manaquibb Zain Ali Shaheer Khan, Aqsa Mumtaz, Alina Fatima, Nimra Ramazan, Jawad Haider, Ahmad Latif, Anum Nawaz. (2017) Frequency of Ovarian Tumors According to WHO Histological Classification and Their Association to Age at Diagnosis, , Volume 23, Issue 2.