Police RL, Trask PC, Wang J, Olivares R, Khan S, Abbe A, Colosia A, Njue A, Sherril B, Ruiz-Soto R, Kaye JA, Hamadani M. Randomized controlled trials in relapsed/refractory follicular lymphoma: a systematic review and meta-analysis. J Oncol Pharm Pract. 2016 Oct;22(5):666-78. doi: 10.1177/1078155215603230
Drummond FJ, Sharp L, Carsin AE, Kelleher T, Comber H. Questionnaire order significantly increased response to a postal survey sent to primary care physicians. J Clin Epidemiol. 2008 Feb;61(2):177-85. doi: 10.1016/j.jclinepi.2007.04.012