Dr. Quyen Van Than from Vietnam and Dr. Kim Ros Arun from Cambodia undertake “Siriraj International Fellowship Training in Clinical Pain Management” at Siriraj Pain Management Clinical Training Center, Department of Anesthesiology, Faculty of Medicine Siriraj Hospital under the supervision of Asst.Prof. Nantthasorn Zinboonyahgoon between August 1st, 2019 – July 31st, 2020. The program sponsored by The International Association for the Study of Pain (IASP) and the World Federation Society of Anesthesiology (WFSA).