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Risk factors and outcome of acute kidney injury in critically ill patients with SARS-CoV-2 pneumonia: a multicenter study Iban Oliva; Cristina Ferré; Xavier Daniel; Marc Cartanyà; Christian Villavicencio; Melina Salgado; Loreto Vidaur; Elisabeth Papiol; FJ González de Molina; María Bodí; Manuel Herrera; Alejandro Rodríguez;