Comparison Between Effect of Letrozole Plus Misoprostol and Misoprostol Alone in Terminating Non-Viable First Trimester Pregnancies: A Single Blind Randomized Trial - Abbasalizadeh, Fatemeh; Sahhaf, Farnaz; Sadeghi-Shabestari, Paria; Mirza-Aghazadeh-Attari, Mohammad; Naghavi-Behzad, Mohammad (Journal of Family and Reproductive Health, 2018)