Maluf, Maria Elisa Zuliani, Andréa Fogli Maldonado, Marcos Eduardo Bercial, and Soraya Ayres Pedroso. 2002. “Stethoscope: A Friend or an Enemy?”. São Paulo Medical Journal 120 (1):13-15. https://periodicosapm.emnuvens.com.br/spmj/article/view/2669.