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)