Dr. Sang Ju Lee is the Director of Yonsei Star Skin & Laser Clinic in Seoul, Korea. He obtained his M.D. and Ph.D. in Dermatology from Yonsei University. He serves on the vice president of the Association of Korean Dermatologists and is the vice president of the Korean Dermatological Association. A former faculty member at Gangnam Severance Hospital, Dr. Lee has authored over 100 peer-reviewed publications and eight medical textbooks. His clinical and research interests include laser dermatology, acne, and skin barrier function.