Retraction Note to: The Clinical Utility of Matrix Metalloproteinase 9 in Evaluating Pathological Grade and Prognosis of Glioma Patients: A Meta-Analysis
1 Department of Pathology, Affiliated Hospital of Shandong Academy of Medical Sciences, Jinan, Shandong, China.
2 Shandong University School of Medicine, Jinan, Shandong, China.
3 Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
4 Department of Thoracic Surgery, Affiliated Hospital of Shandong Academy of Medical Sciences, Jinan, Shandong, China.
5 Department of General Surgery, Affiliated Hospital of Shandong Academy of Medical Sciences, 38# wuyingshan Road, Jinan, Shandong, China. yangxiangshan163@163.com.