Søren D. Østergaard is professor and head of research at the Department of Affective Disorders at Aarhus University Hospital in Denmark. He received his medical degree from Aarhus University in 2009 and the PhD degree from the same university in 2014 with a thesis on psychotic depression. Currently, his research focuses on two main areas: 1) the psychometrics of mood- and psychotic disorders and 2) epidemiological studies of mood- and psychotic disorders based on the nationwide Danish registers. His work is supported by The Carlsberg Foundation, The Lundbeck Foundation, Aarhus University Research Foundation and the Danish Research Council.