Documents Savoirs The role of the humoral immune response in the molecular evolution of the envelope C2, V3 and C3 regions in chronically HIV-2 infected patients Borrego Pedro, Marcelino José, Rocha Cheila, Doroana Manuela, Antunes Francisco, Maltez Fernando, Gomes Perpétua, Novo Carlos, Barroso Helena, Taveira, Taveira Nuno