Department of Dermatology, Faculty of Medicine Siriraj Hospital, Mahidol University, in a collaboration with Merz Institute of Advanced Aesthetics, co-hosted the international masterclass program “Merz APAC Masterclass: Multimodality Approaches in Aesthetic Practice” during March 24-25, 2018, with a very warm welcome to all participants from Australia, Vietnam, Malaysia, Singapore, Hong Kong, Philippines, South Korea, Japan, and Thailand!