Ladan A. Straker, MD

Dr. Xiying Fan is a UCI Health dermatologist. He earned his medical degree from Weill Cornell Medicine in New York City, followed by a residency in dermatology at UCI Medical Center in Orange.

Dr. Christopher B. Zachary is a UCI Health dermatologist who specializes in skin cancer and reconstruction, as well as cosmetic and laser surgery. His clinical interests include dermatologic laser surgery, skin cancer, mohs surgery, melanoma and aesthetic treatments, including skin rejuvenation, botulinum toxin and the full range of injectable fillers. He completed medical school at the Royal Free Hospital, University of London, in the United Kingdom, where he received training in internal medicine and dermatology. At the Institute of Dermatology, Guys and St. Thomas' Hospitals in London, he became interested in dermatological surgery. He subsequently completed training in dermatological surgical at the University of Michigan in Ann Arbor. Zachary returned to London to set up the first Mohs and laser skin surgery practice. In 1988, he became director of the University of Minnesota's Cutaneous Surgery and Laser Center. In 1997, he became a professor and co-director of the Dermatologic Surgery and Laser Center at the UC San Francisco Medical Center. In 2005, he accepted the position as professor at the UCI School of Medicine and went on to serve 15 years as chair of its Department of Dermatology. He is a frequent speaker at national and international symposia and is often contact by national media (e.g., the New York Times, CNN, the Today Show) for commentary about dermatologic issues and treatments. He is a past president of the Association of Academic Dermatologic Surgeons. An educational innovator, he has written and edited numerous papers and books.

Dr. Bryan K. Sun is a board-certified UCI Health dermatologist who treats the full range of skin conditions and disorders. His clinical interests include genetic skin diseases. He earned a medical degree and a PhD from the physician-scientist training program at Harvard Medical School in Boston. He completed a residency in dermatology at Stanford Medical School in Palo Alto, Calif. Sun's research is focused on the genetic and molecular regulators of skin development and diseases. His research interests include determining the function of non-protein coding genomic elements in the skin with a focus on non-coding RNAs; discovering new disease-causing genetic mutations in the coding and non-coding genome and understanding their molecular mechanisms; and understanding the genetic and epigenetic effects of medications on the skin. He is the author or co-author of more than a dozen papers published in leading dermatology journals.