"Version: 20241201"--Title page verso.Includes bibliographical references.1. Skin photoaging / Yang Xu, Xu Chen and Yue Zheng -- 2. Primary prevention for skin photoaging / Yang Xu -- 3. Anti-aging products and medical cosmeceuticals for skin photoaging / Chengfeng Zhang, Xiaoxue Xing, Min Jiang, Zhongyi Xu, Ziqi Liu and Xiuxiu Wang -- 4. Botulinum toxin for skin rejuvenation / Yan Wu, Daniel M…