Panda SR, Sharmila V, Kalidos VK, Hota S. Trial design and protocol of randomized controlled trial comparing the efficacy of combined letrozole and clomiphene versus only letrozole as a method of ovulation induction in women with polycystic ovarian syndrome (CCLOP trial). Int J Clin Trials [Internet]. 2022 Jul. 26 [cited 2025 Oct. 22];9(3):217-20. Available from: https://www.ijclinicaltrials.com/index.php/ijct/article/view/594