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
Westfall PH, Prillaman B, Ho SY. Properties of multiple intersection-union tests for multiple endpoints in combination therapy trials. J Biopharm Stat. 2001;11(3):125-38. doi: 10.1081/BIP-100107653