Observational pain assessment in older persons with dementia in four countries: Observer agreement of items and factor structure of the Pain Assessment in Impaired Cognition
Author(s):
Waal, M.W.M. de (0000-0002-5898-7448); Dalen-Kok, A.H. van; Vet, H.C.W. de; Gimenez-Llort, L.; Konstantinovic, L.; Tommaso, M. de; Fischer, T.; Lukas, A.; Kunz, M.; Lautenbacher, S.; Lobbezoo, F.; McGuire, B.E.; Steen, J.T. van der (0000-0002-9063-7501); Achterberg, W.P. (0000-0001-9227-7135)