Association of Prognostic Nutritional Index with Severity and Mortality of Hospitalized Patients with COVID-19: A Systematic Review and Meta-Analysis. - Hung, Kuo-Chuan; Ko, Ching-Chung; Wang, Li-Kai; Liu, Ping-Hsin; Chen, I-Wen; Huang, Yen-Ta; Sun, Cheuk-Kwan (Diagnostics (2075-4418), 2022)