De Young, A., Vasileva, M., Boruszak-Kiziukiewicz, J., Demipence Seçinti, D., Christie, H., Egberts, M., Anastassiou-Hadjicharalambous, X., Marsac, M., Ruiz, G. & COVID-19 Unmasked Global Collaboration 2021, 'COVID-19 unmasked global collaboration protocol: Longitudinal cohort study examining mental health of young children and caregivers during the pandemic', European Journal of Psychotraumatology, 12(1), article no: 1940760. https://doi.org/10.1080/20008198.2021.1940760