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APA Citation
Li, Y., Kuang, H., Shen, W., Ma, H., Zhang, Y., Stener-Victorin, E., Hung, E., Ng, Y., Liu, J., Kuang, H., Hou, L., & Wu, X. (2013). letrozole, berberine, or their combination for anovulatory infertility in women with polycystic ovary syndrome: study design of a double-blind randomised controlled trial. BMJ open, 3(11), . http://access.bl.uk/ark:/81055/vdc_100135555610.0x000003