Changes in internalizing and externalizing problems in Dutch children and adolescents receiving outpatient youth care before and during the COVID-19 pandemic. - Broek, Emma M.; De Meyer, Ronald; van der Rijken, Rachel; Zijlmans, Josjan; van Oers, Hedy A.; Luijten, Michiel A. J.; Alrouh, Hekmat; Popma, Arne; Bartels, Meike; Vermeiren, Robert R. J. M.; Polderman, Tinca J. C.; Tieskens, Jacintha M. (European Child & Adolescent Psychiatry, 2025)