Bjørn Olav Asvold, MD, PhD, is a Professor of Medicine (Epidemiology) at the HUNT Research Center and the K.G. Jebsen Center for Genetic Epidemiology, Department of Public Health and Nursing, NTNU, Norway. He is also a Consultant Endocrinologist at St. Olavs Hospital, Trondheim University Hospital. Main interests are endocrine and cardiovascular epidemiology. He leads the Mendelian randomization group at the K.G. Jebsen Center for Genetic Epidemiology. Specific research areas include thyroid dysfunction, diabetes, pregnancy complications and cardiovascular risk, and Mendelian randomization studies of cardiometabolic risk factors using data from the HUNT Study. He is Chairman, Scandinavian Society for the Study of Diabetes (SSSD); and Associate Editor, International Journal of Epidemiology.