APOE comparison between human world population (Singh et al. 2006) and human-derived cell lines. a Allele frequency for APOE2, APOE3, and APOE4. Selected data sets were analyzed by χ
2 test (n.s., non-significant). b Probability to select an APOE3/E3 compared to any of the other APOE genotypes (i.e., APOE2/E2, APOE2/E3, APOE3/E4, APOE4/E4, APOE2/E4)