Vascular cause of Dupuytren's?

Diabetes, hypertension, stiff finger joints and Dupuytren's: This study uses retinopathy as an index of vascular disease and suggests that small vessel disease, rather than the effect of blood sugar on collagen, is the link between diabetes and Dupuytren's: http://www.dupuytrenfoundation.org/DupPDFs/1986_Larkin_1218.pdf