Callaghan, J., Stopford, C., Arran, N., Boissé, M., Coleman, A., Santos, R., Dumas, E., Hart, E., Justo, D., Owen, G., Read, J., Say, M., Durr, A., Leavitt, B., Roos, R., Tabrizi, S., Bachoud-Levi, A., Bourdet, C., Van Duijn, E. & Craufurd, D. (2015). Reliability and factor structure of the Short Problem Behaviors Assessment for Huntington's disease (PBA-s) in the TRACK-HD and REGISTRY studies. The Journal of neuropsychiatry and clinical neurosciences, 27(1), 59-64. doi:10.1176/appi.neuropsych.13070169