Point of care ultrasound screening for deep vein thrombosis in critically ill COVID-19 patients, an observational study. - Galien, Sarah; Hultström, Michael; Lipcsey, Miklós; Stattin, Karl; Frithiof, Robert; Rosén, Jacob; the Uppsala Intensive Care COVID-19 Research Group; Luther, Tomas; Bülow Anderberg, Sara; Gradin, Anna; Rubertsson, Sten; Hanslin, Katja (Thrombosis Journal, 2021)