Notably, we investigated the T102C polymorphism rather than the -1438G/A polymorphism of the 5-HT2a receptor gene; however, these polymorphisms are in complete linkage disequilibrium (i.e., the two SNP's have not been separated by recombination; Spurlock et al., 1998). Thus, the C allele of the T102C SNP almost always occurs together on the chromosome with the G allele of the -1438G/A SNP, and the same is true for the T102C T allele and the -1438G/A A allele.
