Depression and anxiety symptoms in young adults before and during the COVID-19 pandemic: evidence from a Canadian population-based cohort oleh Kia Watkins-Martin, Massimiliano Orri, Marie-Hélène Pennestri, Natalie Castellanos-Ryan, Simon Larose, Jean-Philippe Gouin, Isabelle Ouellet-Morin, Nicholas Chadi, Frederick Philippe, Michel Boivin, Richard E. Tremblay, Sylvana Côté, Marie-Claude Geoffroy