Corrigendum: Systemic-immune-inflammation index as a promising biomarker for predicting perioperative ischemic stroke in older patients who underwent non-cardiac surgery - Zhang, Faqiang; Niu, Mu; Wang, Long; Liu, Yanhong; Shi, Likai; Cao, Jiangbei; Mi, Weidong; Ma, Yulong; Liu, Jing (Frontiers in Aging Neuroscience, 2022)