See CW, Srinivasan M, Saravanan S, Oldenburg CE, Esterberg EJ, Ray KJ, Glaser TS, Tu EY, Zegans ME, McLeod SD, Acharya NR, Lietman TM. Prior elicitation and Bayesian analysis of the Steroids for Corneal Ulcers Trial. Ophthalmic Epidemiol. 2012 Dec;19(6):407-13.
Küçükdeveci AA, McKenna SP, Kutlay S, Gürsel Y, Whalley D, Arasýl T. The development and psychometric assessment of the Turkish version of the Nottingham Health Profile. Int J Rehabil Res. 2000 Mar 1;23(1):31-8.
Parsley (Edwards) TL. Review of the phantom respondents: opinion surveys and political representation. J Off Stat. 1994;10(3):351-5.