TP53 and glioblastoma: Interestingly, among the global glioma cases (Fig. 5b), the distribution range of the Pro/Pro genotype of p53 codon 72 was only 2.2–8.7% in the Caucasian population, excluding India and Brazil, whereas the distribution range of the Pro/Pro genotype of p53 codon 72 in India was close to that in our GBM data, in spite of Indians being affiliated with the Caucasian population.