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APA Citation
Polis, C. B., Curtis, K. M., Hannaford, P. C., Phillips, S. J., Chipato, T., Kiarie, J. N., Westreich, D. J., & Steyn, P. S. (2016). an updated systematic review of epidemiological evidence on hormonal contraceptive methods and HIV acquisition in women. AIDS, 30, . http://access.bl.uk/ark:/81055/vdc_100041943732.0x00004c