Corbett, A. ., Achterberg, W. ., Husebo, B. ., Lobbezoo, F. ., de Vet, H. ., Kunz, M. ., … Lautenbacher, S. . (2014). An international road map to improve pain assessment in people with impaired cognition: the development of the Pain Assessment in Impaired Cognition (PAIC) meta-tool. BMC Neurology, 14, 229. https://doi.org/10.1186/s12883-014-0229-5 (Original work published 2014)