Positive fluid balance as an early biomarker for acute kidney injury: a prospective study in critically ill adult patients - Ávila, Maria Olinda Nogueira; Rocha, Paulo Novis; Perez, Caio A; Faustino, Tássia Nery; Batista, Paulo Benigno Pena; Yu, Luis; Zanetta, Dirce Maria Trevisan; Burdmann, Emmanuel de Almeida (Clinics, 2021)