Cox, Justin M., Keshav R. Nayak, and William E. Bennett. “Correlation of Auscultatory Severity of Aortic Stenosis With Trans Thoracic Echocardiography (CASSETTE): Pilot Study for Tele-Stethoscopy in Rural or Global Health Applications”. The Columbia University Journal of Global Health 7, no. 2 (December 21, 2017): 4–8. Accessed January 24, 2022. https://journals.library.columbia.edu/index.php/jgh/article/view/4975.