Mansfield C, Thomas N, Gebben D, Lucas M, Hauber AB. Preferences for multiple sclerosis treatments: using a discrete-choice experiment to examine differences across subgroups of US patients. Int J MS Care. 2017 Jul;19(4):172-83. doi: 10.7224/1537-2073.2016-039
Le Moine JG, Fiestas Navarrete L, Katumba K, Launois R. Psychometric validation of the 14 items chronic venous insufficiency quality of life questionnaire (CIVIQ-14): confirmatory factor analysis. Eur J Vasc Endovasc Surg. 2016 Feb;51(2):268-74. doi: 10.1016/j.ejvs.2015.08.020.
Derby CA, Araujo AB, Johannes CB, Feldman HA, McKinlay JB. Measurement of erectile dysfunction in population-based studies: the use of a single question self-assessment in the Massachusetts Male Aging Study. Int J Impot Res. 2000 Aug 1;12(4):197-204.