Serum proteomics study on cognitive impairment after cardiac valve replacement surgery: a prospective observational study 1Department of Anesthesiology, Medical College of Soochow University, Soochow, Jiangsu Province, China 2Department of Anesthesiology, Zunyi Maternal and Child Health Care Hospital, Zunyi, Guizhou Province, China 3Department of Anesthesiology, Longgang District Maternity and Child Healthcare Hospital of Shenzhen City, Shenzhen, Guangdong Province, China 4Department of...