Comparison of dietary habits before and after the COVID-19 restrictions in a population of children aged 7-14 participating in the PICTURE study - Alicja Basiak-Rasała; Katarzyna Połtyn-Zaradna; Agnieszka Matera-Witkiewicz; Dagmara Gaweł-Dąbrowska; Katarzyna Kiliś-Pstrusińska; Katarzyna Zatońska; Tomasz Zatoński (Journal of Health Inequalities)