The Top 20 Surgical Procedures Associated with the Highest Risk for Blood Transfusion. Issue 13 (3rd October 2020) - Montroy, Joshua; Lavallée, Luke T; Zarychanski, Ryan; Fergusson, Dean; Houston, Brett; Cagiannos, Ilias; Morash, Chris; Tinmouth, Alan; Hutton, Brian; Mallick, Ranjeeta; Flaman, Anathea; Breau, Rodney H.