Janssens R, Lang T, Vallejo A, Galinsky J, Morgan K, Plate A, De Ronne C, Verschueren M, Schoefs E, Vanhellemont A, Delforge M, Schjesvold F, Cabezudo E, Vandebroek M, Stevens H, Simoens S, Huys I. What matters most to patients with multiple myeloma? a Pan-European patient preference study. Front Oncol. 2022 Nov 29;12:1027353. doi: 10.3389/fonc.2022.1027353
DiTrapani J, Rockwood N, Jeon M. Explanatory IRT analysis using the SPIRT macro in SPSS. TQMP. 2018;14(2):81-98. doi: 10.20982/tqmp.14.2.p081