Early administration of fibrinogen concentrate in patients with polytrauma with thromboelastometry suggestive of hypofibrinogenemia: A randomized feasibility trial Lucas Siqueira de Lucena; Roseny dos Reis Rodrigues; Maria José Carvalho Carmona; Francisco José Diniz Noronha; Helenode Paiva Oliveira; Natalia Martins Lima; Rodrigo Brandão Pinheiro; Wallace Andrino da Silva; Alexandre Biasi Cavalcanti;