Armstrong-Buisseret, L., Brittain, C., David, M., Dean, G., Griffiths, F., Hepburn, T., …Ross, J. D. (2019). Metronidazole versus lactic acid for treating bacterial vaginosis (VITA): protocol for a randomised controlled trial to assess the clinical and cost effectiveness of topical lactic acid gel for treating second and subsequent episodes of bacterial vaginosis. Trials, 20, Article 648. https://doi.org/10.1186/s13063-019-3731-7