Occupational Safety Officer Training Courses in Executive Level, 2021 On March 23rd, 2021, Assoc. Prof. Dr. Sirichai Kiattavorncharoen, Dean of Mahidol University Faculty of Dentistry, presided over “Occupational Safety Officer Training Course in Executive Level, 2021”, which was held at 302 – 303 meeting room, 3rd floor, the H.R.H. Princess Maha Chakri Sirindhorn Building…