Rojas-Sahagún, Victoí Manuel, et al. “LDH-Neutrophil-Lymphocyte Index As a Predictor of 28-Day Mortality in Patients With COVID-19”. Revista Médica Del Instituto Mexicano Del Seguro Social, vol. 61, no. 5, Sept. 2023, pp. 567-73, https://revistamedica.imss.gob.mx/index.php/revista_medica/article/view/4927.