Kristy A. Brown, Ph.D., is a NHMRC Career Development Fellow and Co-Head of the Metabolism and Cancer Group at Prince Henry's Institute. Dr. Brown is also an Adjunct Lecturer of Physiology at Monash University. Dr Brown's area of research interest is the regulation of the aromatase gene in the context of obesity and breast cancer. Evan Simpson, Ph.D., is a Senior Principal Research Fellow and Co-Head of the Metabolism and Cancer group at Prince Henry's Institute. He is also an Honorary Professor for the Department of Biochemistry and Molecular Biology and Monash University. Dr. Simpson is the Laboratory Director of the Victorian Breast Cancer Research Consortium. This consortium involves eight medical research institutes and was established in 1997 to conduct world class research into breast cancer. Dr. Simpson's work also led to the creation of the first aromatase knockout (ArKO) mouse, which is a model of oestrogen insufficiency that compares with the phenotype of humans with natural mutations in aromatase. His current research is focused on the role of oestrogen in several important health conditions, including obesity, diabetes, osteoporosis and of course, breast cancer.