Aguado J, Campbell A, Ascaso C, Navarro P, Garcia-Esteve L, Luciano JV. Examining the factor structure and discriminant validity of the 12-Item General Health Questionnaire (GHQ-12) among Spanish postpartum women. Assessment. 2012 Dec 19;19(4):517-25.
McKenna SP, Williamson T, Renck-Hooper U, Whalley D. The development and testing of UK and Canadian English versions of the Incontinence Quality of Life Index (IQoLI). J Outcomes Res. 1997;1:9-18.
Renck-Hooper U, McKenna SP, Whalley D. Measuring quality of life in female urinary urge incontinence: development and psychometric properties of the IQoLI. J Outcomes Res. 1997;1:1-8.