On March 27th, 2023, the Department of Otorhinolaryngology, Faculty of Medicine Siriraj Hospital, held special lecture series by Prof. Luisa Maria Bellussi, Honorary President of the Italian Society of Pediatric Otolaryngology on the topic “Medical therapy of OSAS”; Prof. Maria Pia Villa, Professor of Pediatrics, University of Rome, Italy, on the topic “Nasal obstruction in Childhood”; and Prof. Desiderio Passali, IFOS Past President on the topic “Oxidative stress in OSAS and Snores patients”.