Seung Jun Choi is a Clinical Assistant Professor of the Department of Laboratory Medicine at Yongin Severance Hospital, Yonsei University College of Medicine. He received his Bachelor’s in Medicine from Yonsei University and is in a Ph.D. program in medicine from Yonsei University. He was a resident of laboratory medicine in the Severance Hospital for four years and a fellow of laboratory medicine for one year in the Seoul St. Mary’s Hospital and one year in the Yongin Severance Hospital. His research interests were blood transfusion, immunohematology, and diagnostic immunology. He has been a Korean Society of Blood Transfusion member and an assistant editor of the Korean Journal of Blood Transfusion since 2021.