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Table 2: Types of algorithms used to predict the molecular subtypes of gliomas and the number of studies that used them
IDH MGMT 1p/19q H3 K27M ATRX TERT Others
Internal validation 
 Tree-based 11 4 4 4 0 0 4
 SVM 9 1 2 2 1 2 4
 Neural networks 14 6 3 0 0 0 2
 Others 3 1 0 0 0 0 0
External validation 
 Tree-based 4 1 0 0 1 1 1
 SVM 2 1 2 0 1 0 1
 Neural networks 1 0 0 0 0 0 0
 Others 0 1 0 0 0 1 0