Dube, P., Kurt, K., Bair, M. J., Theobald, D., & Williams, L. S. (2010). The P4 screener: Evaluation of a brief measure of assessing potential suicide risk in randomized effectiveness trials of primary care and oncology patients. Primary care companion to the Journal of Clinical Psychiatry, 12, doi: 10.4088/PCC.10m00978blu