Methylene blue for refractory shock in polytraumatized patient: a case report - Volpon, Leila Costa; Evora, Paulo Roberto Barbosa; Teixeira, Gisele Douradinho; Godinho, Maurício; Scarpelini, Sandro; Carmona, Fabio; Carlotti, Ana Paula de Carvalho Panzeri (Journal of Emergency Medicine, 2018)