Purser M, Bhaila R, Hartley L, Earnshaw S, Nag A. The economic burden of Crohn's disease in Europe: findings from a systematic literature review. Poster presented at the 2019 27th United European Gastroenterology UEG Week; October 23, 2019. Barcelona, Spain. [abstract] United European Gastroenterol J. 2019 Oct; 7:906.
Purser M, Bhaila R, Hartley L, Earnshaw S, Nag A. Economic evaluations of biological treatments for moderate-to-severe Crohn's Disease: findings from a systematic literature review. Poster presented at the 2019 United European Gastroenterology UEG Week; October 23, 2019. Barcelona, Spain. [abstract] United European Gastroenterol J. 2019 Oct; 7:907.
Camilleri M, Lembo AJ, Lavins BJ, Macdougall JE, Carson RT, Williams VSL, Nelson LM, Shiff SJ, Currie MG, Kurtz CB, Johnston JM. Comparison of adequate relief with symptom, global, and responder endpoints in linaclotide phase 3 trials in IBS-C. United European Gastroenterol J. 2015 Feb 3;3(1):53-62. doi: 10.1177/2050640614555946
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.