Mol, B. W., Wood, S., Rode, L., Tabor, A., Aboulghar, M. M., Porcher, R., Senat, M., Bagga, R., Rajaram, S., Azargoon, A., Bahrami, E., Nassar, A., Schuit, E., van Os, M. A., Crowther, C. A., Alfirevic, Z., Beresford, L., Dietz, K. C., Duley, L., Hodkinson, A., Llewellyn, A., Norman, J. E., Norrie, J., Sharif, S., Simmonds, M., Stewart, L. A., Walker, R. A. E., Walley, T., Wright, K., Blackwell, S. C., Caritis, S. N., Combs, C. A., Croswell, J. M., Das, A. F., Dickersin, K., Elimian, A., Grobman, W. A., Maurel, K. A., McKenna, D. S., Moley, K., Mueller, J., O'Brien, J. M., Rouse, D. J., Sakala, C., Simpson, J. L., Smith, K., Thom, E. A., & Whitlock, E. P. (2021). evaluating Progestogens for Preventing Preterm Birth International Collaborative (EPPPIC): Meta-analysis of Individual Participant Data From Randomised Controlled Trials. Obstetrical & gynecological survey, 76(8), 464–466. http://access.bl.uk/ark:/81055/vdc_100145480086.0x000058