Koch, S. ., Andersson, M. ., Hvelplund, C. ., & Skovgaard, A. . (2020). Mental disorders in referred 0-3-year-old children: a population-based study of incidence, comorbidity and perinatal risk factors. European Child & Adolescent Psychiatry. https://doi.org/10.1007/s00787-020-01616-2 (Original work published 2020)