Assoc. Prof. Dilok Piyayotai, Dean of Faculty of Medicine, Thammasat University and and delegates welcomed Professor Raymond J. Andersen, University of California, Los Angeles, USA on 9 August 2023 at Faculty of Medicine, Thammasat University. On this occasion, Professor Andersen lectured in a topic of “Single-inhaler triple therapy (SITT) in reducing COPD exacerbations and mortality” and “CPET for COPD evaluation” for medical staff and students.