Prof. Ellen Heitzer is an EU-registered clinical laboratory geneticist at Diagnostic & Research Institute of Human Genetics, Medical University of Graz, Austria, where she is heading the Research Unit for liquid biopsies for personalized medicine in cancer. Her research group has extensive experience in the analysis of plasma DNA and has established a plethora of plasma DNA-based approaches to study genome-wide copy number alterations and high-sensitivity approaches to detect specific mutations occurring at low allele frequencies. In this highly competitive field, the group is internationally recognized. As a steering committee member of the European Liquid Biopsy Society (ELBS), Prof. Heitzer advocates for the standardization and guidelines of LB approaches to enable widespread clinical use.