Candrilli SD, Davis KL, Kan HJ, Lucero MA, Rousculp MD. Prevalence and the associated burden of illness of symptoms of diabetic peripheral neuropathy and diabetic retinopathy. J Diabetes Complications. 2007 Oct 1;21(5):306-14.
Ellison-Loschmann L, Sunyer J, Plana E, Pearce N, Zock JP, Jarvis D. Socioeconomic status, asthma and chronic bronchitis in a large community-based study. Eur Respir J. 2007 May;29(5):897-905.