Protocol for validation of the 4AT, a rapid screening tool for delirium: a multicentre prospective diagnostic test accuracy study - Shenkin, S. D., Fox, C., Godfrey, M., Siddiqi, N., Goodacre, S., Young, J., Anand, A., Gray, A., Smith, J., Ryan, T., Hanley, J., Mac; Raild, A., Steven, J., Black, P. L., Boyd, J., Weir, C. J., Mac; Lullich, A. M. (BMJ Publishing, 2018)
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