Retraction Note: Vaginal progesterone for prevention of preterm labor in asymptomatic twin pregnancies with sonographic short cervix: a randomized clinical trial of efficacy and safety.

MLA

El-Refaie, Waleed, et al. “Retraction Note: Vaginal Progesterone for Prevention of Preterm Labor in Asymptomatic Twin Pregnancies with Sonographic Short Cervix: A Randomized Clinical Trial of Efficacy and Safety.” Archives of Gynecology and Obstetrics, vol. 304, no. 4, Oct. 2021, p. 1113. EBSCOhost, https://doi.org/10.1007/s00404-021-06152-1.

APA

El-Refaie, W., Abdelhafez, M. S., & Badawy, A. (2021). Retraction Note: Vaginal progesterone for prevention of preterm labor in asymptomatic twin pregnancies with sonographic short cervix: a randomized clinical trial of efficacy and safety. Archives of Gynecology and Obstetrics, 304(4), 1113. https://doi.org/10.1007/s00404-021-06152-1

Chicago

El-Refaie, Waleed, Mohamed S Abdelhafez, and Ahmed Badawy. 2021. “Retraction Note: Vaginal Progesterone for Prevention of Preterm Labor in Asymptomatic Twin Pregnancies with Sonographic Short Cervix: A Randomized Clinical Trial of Efficacy and Safety.” Archives of Gynecology and Obstetrics 304 (4): 1113. doi:10.1007/s00404-021-06152-1.