The practical impact of differential item functioning analyses in a health-related quality of life instrument
Scott, N. W., Fayers, P. M., Aaronson, N. K., Bottomley, A., de Graeff, A., Groenvold, M., Gundy, C., Koller, M., Petersen, M. A., Sprangers, M. A. G., EORTC Quality of Life Group, Quality of Life Cross-Cultural Meta-Analysis Group
Quality of Life Research, vol. 18, no. 8, pp. 1125-1130