Alterations in the serum metabolome in patients with the COVID-19 Omicron variant and in recovered cases - Feng Gao; Daming Wang; Lihua Zuo; Junyi Sun; Bowen Dong; Ranran Sun; Yingying Shi; Ying Sun; Yawen Zou; Qingquan Jia; Na Han; Haiyu Wang; et al. (PLoS ONE, 2025)