V. Rosen, Allison, Sahil Koppikar, Catherine Shaw, and Adrian Baranchuk. “Common ECG Lead Placement Errors. Part II: Precordial Misplacements”. International Journal of Medical Students 2, no. 3 (September 20, 2014): 99–103. Accessed October 25, 2021. https://www.ijms.info/IJMS/article/view/96.