14. Yaar, M. Clinical and histological features of intrinsic versus extrinsic skin aging, Gilchrest B, Krutmann J, eds. Skin Aging. Heidelberg: Springer; 2006. p. 9-22.

14. Yaar, M. Clinical and histological features of intrinsic versus extrinsic skin aging, Gilchrest B, Krutmann J, eds. Skin Aging. Heidelberg: Springer; 2006. p. 9-22.