Mental health and quality of life in children and adolescents during the COVID-19 pandemic: a systematic review of longitudinal studies oleh Ester Orban, Lydia Yao Li, Martha Gilbert, Ann-Kathrin Napp, Anne Kaman, Sabine Topf, Maren Boecker, Maren Boecker, Janine Devine, Franziska Reiß, Flora Wendel, Flora Wendel, Caroline Jung-Sievers, Caroline Jung-Sievers, Vanessa Sophie Ernst, Marco Franze, Eva Möhler, Eva Breitinger, Stephan Bender, Ulrike Ravens-Sieberer