Viala-Danten M, Martin SA, Guillemin I, Hays RD. Evaluation of the reliability and validity of the medical outcomes study sleep scale in patients with painful diabetic peripheral neuropathy during an international clinical trial. Health Qual Life Outcomes. 2008 Dec;6(113).
Arbuckle R, Atkinson MJ, Clark M, Abetz L, Lohs J, Kuhagen I, Harness J, Draelos Z, Thiboutot D, Blume-Peytavi U, Copley-Merriman K. Patient experiences with oily skin: the qualitative development of content for two new patient reported outcome questionnaires. Health Qual Life Outcomes. 2008 Oct 16;6:80. doi: 10.1186/1477-7525-6-80.