Investigating use of diagnostic codes for post-COVID- 19 condition in Ontario health administrative data by Joseph S. Munn, Clare L. Atzema, Peter C. Austin, Stacey J. Butler, Lee Fidler, Xuesong Wang, Andrea S. Gershon

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Turbulence in the system: Higher rates of left‐without‐being‐seen emergency department visits and associations with increased risks of adverse patient outcomes since 2020 by Candace D. McNaughton, Peter C. Austin, Anna Chu, Maria Santiago‐Jimenez, Emily Li, Jessalyn K. Holodinsky, Noreen Kamal, Mukesh Kumar, Clare L. Atzema, Manav V. Vyas, Moira K. Kapral, Amy Y. X. Yu

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Association between dipeptidyl peptidase-4 inhibitors and glucagon-like peptide-1 receptor agonists and COVID-19 infection and adverse outcomes: a cohort study by Douglas S Lee, Peter C Austin, Michael E Farkouh, Cynthia A Jackevicius, Jeffrey C Kwong, Bing Yu, Heather Ross, Jiming Fang, Joan Porter, Vladimír Džavík, Alanna Weisman, Andrea S Gershon, Wade Thompson, Jacob A Udell, Clare L Atzema, Laura E Ferreira-Legere, Andrew Ha

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Assessing effective mask use by the public in two countries: an observational study by Peter C Austin, Bory Kea, Bin Chen, Arshia P Javidan, Huong Nguyen, Alex Chang, Allen Li, Clare L Atzema, Ivona Mostarac, Dana Button, Lauren Wintraub, Raumil V Patel, Daniel Dongjoo Lee, Nathaniel P Latham, Eric A Latham, Patrick C M Brown, Rita D Somogyi, Sara Buerk, Tristen Zimmerman, Trevor Funari, Cameron Colbert

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