DiBenedetti DB, Nguyen D, Zografos L, Ziemiecki R, Zhou X. A population-based study of Peyronie's disease: prevalence and treatment patterns in the United States. Adv Urol. 2011 Jun 27;2011(Article ID 282503).
Whalley D, Gravelle H, Sibbald B. Effect of the new contract on GPs' working lives and perceptions of quality of care: a longitudinal survey. Br J Gen Pract. 2008 Jan 1;58(546):8-14.
Whalley D, Bojke C, Gravelle H, Sibbald GP. GP job satisfaction in view of contract reform: a national survey. Br J Gen Pract. 2006 Feb 1;56(523):87-92.