Independent early predictors of mortality in polytrauma patients: a prospective, observational, longitudinal study - Costa, Luiz Guilherme V. da; Carmona, Maria José; Malbouisson, Luiz M.; Rizoli, Sandro; Rocha-Filho, Joel Avancini; Cardoso, Ricardo Galesso; Auler-Junior, José Otávio Costa (Clinics, 2017)