Carter, G. ., Milner, A. ., McGill, K. ., Pirkis, J. ., Kapur, N. ., & Spittal, M. . (2017). Predicting suicidal behaviours using clinical instruments: systematic review and meta-analysis of positive predictive values for risk scales. The British Journal of Psychiatry : The Journal of Mental Science, 210(6), 387-395. https://doi.org/10.1192/bjp.bp.116.182717