2Oya S,Kawai K,Nakatomi H,et al.Significance of Simpson grading system in modern meningioma surgery:integration of the grade with MIB-1labeling index as a key to predict the recurrence of WHO Grade I meningiomas[J].Clinical article.Journal of neurosurgery,2012,117(1):121-128.
3Louis DN,Ohgaki H,Wiestler OD.The 2007 WHO classification of tumours of the central nervous system[J].Acta Neuropathologica,2007,114(2):97-109.