Strober B, Sigurgeirsson B, Popp G, Sinclair R, Krell J, Stonkus S, Septe M, Elewski BE, Gottlieb AB, Zhao Y, Herrera V, Mordin M, Odom D, Papavassilis C, Nyirady J, Lebwohl M. Secukinumab provides clearer skin and better control on patient-reported psoriasis symptoms of itching, pain, and scaling than placebo and etanercept. J Psoriasis and Psoriatic Arthritis. 2016;1(4):167-75.
Scrams DJ, McLeod LD. An expected response function approach to graphical differential item functioning. J Educ Meas. 2000 Jan 1;37(3):263-77.
Williams VSL, Rosa KR, McLeod L, Thissen D, Sanford EE. Projecting to the NAEP Scale: results from the North Carolina End‐of‐Grade Testing Program. J Educ Meas. 1998 Dec;35(4):277-96. doi: 10.1111/j.1745-3984.1998.tb00539.x
Williams VSL, Pommerich M, Thissen D. A comparison of developmental scales based on Thurstone methods and item response theory. J Educ Meas. 1998 Jun;35(2):93-107.