books.google.ca - The effects of UV exposure and aging are becoming an increasingly critical issue in clinical practice. Sun exposure and other sources of UV radiation play a major role in the early appearance of fine and coarse wrinkles, roughness, laxity, irregular pigmentation, and roughness of the skin. This clinical...https://books.google.ca/books/about/Photoaging.html?id=RvCINU2hOHAC&utm_source=gb-gplus-sharePhotoaging