She graduated from the Medical College of Chung-Ang University at Seoul in Korea, 1992. Dr. Chang completed her residency in Clinical Pathology at Chung-Ang Medical Hospital, and she did her fellowship training in Hemato-Oncology with Bong-Hak Hyun, MD, PhD at Ajou University Hospital in 1999. She received her PhD in 2000 and her PhD thesis was involved in the Clinical significance of p53, MDM2, CyclinD1 protein expression in patients with Multiple Myeloma'. She has a board certified in clinical pathology of Korea. Dr. Chang has worked as a Clinical Assistant Professor in the Department of Laboratory Medicine at the University of Korea before she joined the CRL. At the University of Korea, her main research there involved Diagnostic Hemato-oncology, and Immunology.