Menegozzo, Carlos Augusto, Priscila Cazolari, Fernando Novo, Ramiro Colleoni, and Edivaldo Utiyama. “Prospective Analysis of Short- and Mid-Term Knowledge Retention After a Brief Ultrasound Course for Undergraduate Medical Students”. Clinics 74 (September 23, 2019): e1087. Accessed August 4, 2020. http://www.revistas.usp.br/clinics/article/view/162531.