%0 Journal Article %T Chronic Ulcers: Updating Epidemiology, Physiopathology, and Therapies %A Marco A. C. Frade %A Pranab K. Das %J Ulcers %D 2013 %I Hindawi Publishing Corporation %R 10.1155/2013/964826 %U http://www.hindawi.com/journals/ulcers/2013/964826/