Predictive value of hypocalcemia in the diagnosis of acute respiratory failure in COVID-19 in a second-level care hospital. Revista de la Sociedad Peruana de Medicina Interna, [S. l.], v. 34, n. 4, p. 139–145, 2021. DOI: 10.36393/spmi.v34i4.629. Disponível em: https://revistamedicinainterna.net/index.php/spmi/article/view/629.. Acesso em: 3 jul. 2024.