Comment on "Sedative and Analgesic Effects of Entonox Gas Compared with Midazolam and Fentanyl in Synchronized Cardioversion".
Evandro Chagas National Institute of Infectology, Oswaldo Cruz Foundation (FIOCRUZ), Rua Conde de Bonfim 255, Sala 505, Tijuca, 20520-051 Rio de Janeiro, RJ, Brazil.
Henrique Horta
HH
Veloso