Xie L, Zhang D, Ma H, et al. The Effect of Berberine on Reproduction and Metabolism in Women with Polycystic Ovary Syndrome: A Systematic Review and Meta-Analysis of Randomized Control Trials. Evid Based Complement Alternat Med. 2019;2019:7918631. Published 2019 Dec 13. doi:10.1155/2019/7918631