Author Biographies 537 the University of Pennsylvania School of Medicine, in Philadelphia, prior to which he was held a residency in dermatology at National Cheng Kung University, where he also earned in degree in Medicine. Yang is author or coauthor of more than two dozens papers, presentations, and other scientific communication. He is a board member of the Taiwanese Dermatological Association and has won study awards from the National Science Council and National Cheng Kung University. His clinical interests include hair diseases, scalp tumors, and hair follicle stem cells, dermal papilla cells, and their application in hair regeneration models. Yuhang Zhang, PhD, is assistant professor of Pharmaceutics and Dermatology at the University of Cincinnati’s Winkle College of Pharmacy, prior to which he was senior research investigator in the Departments of Dermatology and Cell and Developmental Biology at the University of Pennsylvania. He has earned Bachelor’s and Master’s degrees in Applied Microbiology from Nanjing Agricultural University, in Nanjing, China, and a PhD in Molecular Biology and Bioengineering from South China University of Technology, in Guangzhou, China. His research interests include the genetic and epigenetic programs implicated in skin tissue homeostasis and how skin epithelial keratinocytes, melanocytes, and dermal fibroblasts respond to various external cues to coordinate changes in transcription, cell polarity, and adhesion. Zhang has been recognized as the 2011 Next Generation Biomedical Investigator by the Center of Environmental Genetics, University of Cincinnati, and is a member of the Society for Investigative Dermatology, American Association of College of Pharmacy, and the Society for Melanoma Research.