Age-stratified prognostic performance of hematologic inflammatory indices for 30-day mortality in emergency department patients with PCR-confirmed COVID-19: A cohort study from the pre-vaccination pandemic era - Derya Abuşka; Özlem Dikme; Özgür Dikme; Tahir Talat Yurttaş; Uğur Durmuş; Atakan Yüksekbaş (PLoS ONE, 2026)