Brubaker L, Richter HE, Barber MD, Hsu Y, Rahn DD, Menefee S, Visco A, Spino C, Martin S, Meikle SF. Pelvic floor disorders clinical trials: participant recruitment and retention. Int Urogynecol J. 2013 Jan 1;24(1):73-9.
Wirén L, Whalley D, McKenna SP, Wilhelmsen L. Application of a disease-specific, quality-of-life measure (QoL-AGHDA) in growth hormone-deficient adults and a random population sample in Sweden: validation of the measure by Rasch analysis. Clin Endocrinol (Oxf). 2000 Feb;52(2):143-52.
McKenna S, Doward LC. Measuring quality of life in adults with growth hormone deficiency. Clin Endocrinol (Oxf). 1996 Oct;45(4):507-8.