Clomiphene citrate combined with metformin versus letrozole for induction of ovulation in clomiphene-resistant polycystic ovary syndrome: a randomized clinical trial
Gynecological endocrinology : the official journal of the International Society of Gynecological Endocrinology (2018) - Comments
doi: 10.1080/09513590.2017.1395838  issn: 0951-3590  issn: 1473-0766  pubmed: 29076376 

Mohamed Rezk, Abd-Elhamid Shaheen, Ibrahim Saif El-Nasr