Rouse M, Twiss J, McKenna SP. Co-calibrating quality-of-life scores from three pulmonary disorders: implications for comparative-effectiveness research. J Med Econ. 2016 Jun;19(6):596-603. doi: 10.3111/13696998.2016.1148700
Twiss J, McKenna SP, Crawford SR, Tammaru M, Oprandi NC. Adapting the Asthma Life Impact Scale (ALIS) for use in Southern European (Italian) and Eastern European (Russian) cultures. J Med Econ. 2011;14(6):729-38. doi: 10.3111/13696998.2011.615356
Brodersen J, Meads DM, Kreiner S, Thorsen H, Doward LC, McKenna SP. Methodological aspects of differential item functioning in the Rasch model. J Med Econ. 2007;10:309-22.
Williams VSL. The "unbiased" anchor: bridging the gap between DIF and item bias. Appl Meas Educ. 1997;10(3):253-67. doi: 10.1207/s15324818ame1003_4