On February 4th, 2020, Dr. Pham Le Tra from Gia Lai Province Hospital, Vietnam, attending “Clinical Observership Program in Cardiology” at Division of Cardiology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, between April 4th – March 31st, 2020, under the supervision of Assoc. Prof. Nattawut Wongpraparut of Division of Cardiology.