9Battistutta D,,Pandeya N,Strutton GMet al.Skin surfacetopography grading is a valid measure of skin photoaging. Photodermatology Photoimmunology and Photomedicine . 2006
10Sefton J.Photodamage pilot study:a double-blind,vehi-cle-controlled studuy to assess the efficacy and safetyoftazarotene 0.1%gel. Journal ofthe American Academy ofDermatology . 2000
