AUTHOR=Zhao Long , Qi Lijuan , Fu Jinhua , Bi Shuqin , Li Lin , Fu Yinghui TITLE=Corrigendum: Efficacy of Intrauterine Perfusion of Cyclosporin A for Intractable Recurrent Spontaneous Abortion Patients With Endometrial Alloimmune Disorders: A Randomized Controlled Trial JOURNAL=Frontiers in Physiology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2021.774213 DOI=10.3389/fphys.2021.774213 ISSN=1664-042X