Ma, Keon, Erin Pols, and Jennifer Thull-Freedman. “Use of Rational Subgrouping to Identify Areas for Improving Time to Ultrasound Performance ”. Canadian Journal of Emergency Nursing 45, no. 2 (July 12, 2022): 16–17. Accessed April 25, 2024. https://cjen.ca/index.php/cjen/article/view/179.