Toy, S., McKay, R., Walker, J., Johnson, S., & Arnett, J. (1969). Using Learner-Centered, Simulation-Based Training to Improve Medical Students’ Procedural Skills. Journal of Medical Education and Curricular Development, 4, 2382120516684829. https://doi.org/10.1177/2382120516684829 (Original work published 1969)