Cohort Profile: The Tracking Opportunities And Problems Study (Topp)-Study Of Norwegian Children And Their Parents Followed From Infancy To Early Adulthood

Cohort Profile: The Tracking Opportunities and Problems Study (TOPP)–study of Norwegian 5 children and their parents followed from infancy to early adulthood Wendy Nilsen,* Anne Kjeldsen, Evalill Bølstad Karevold, Anni Skipstein, Maren Sand Helland, Kristin Gustavson, Frøydis Enstad, Silje Baardstu, Espen Røysamb, Tilmann von Soest and 10 Kristin S. Mathiesen Department of Mental Disorders, Mental and Physical Health, Norwegian Institute of Public Health, Oslo, Norway, Work Research Institute, Oslo and Akershus University College of Applied Sciences, Oslo, Norway, Department of Child Development, Norwegian Institute of Public Health, Oslo, Norway and Department of Psychology, University of Oslo, Norway