Risk factors for severe COVID-19 in hospitalized children in Canada: A national prospective study from March 2020–May 2021 oleh Daniel S. Farrar, Olivier Drouin, Charlotte Moore Hepburn, Krista Baerg, Kevin Chan, Claude Cyr, Elizabeth J. Donner, Joanne E. Embree, Catherine Farrell, Sarah Forgie, Ryan Giroux, Kristopher T. Kang, Melanie King, Melanie Laffin Thibodeau, Julia Orkin, Naïm Ouldali, Jesse Papenburg, Catherine M. Pound, Victoria E. Price, Jean-Philippe Proulx-Gauthier, Rupeena Purewal, Christina Ricci, Manish Sadarangani, Marina I. Salvadori, Roseline Thibeault, Karina A. Top, Isabelle Viel-Thériault, Fatima Kakkar, Shaun K. Morris