TF Tsai is professor and head of department of dermatology, National Taiwan University Hospital. He had been the past editor-in-chief for Dermatologica Sinica for 7 years. In medical dermatology, since 1992, he published more than 300 peer review articles on psoriasis, viral infection, hair loss, cosmetic dermatology and dermatopathology. Also he has extensive experience on regulatory affairs of drugs, devices and cosmetics..