Genotyping of the schizophrenia sample
The allelic frequency of the disease-associated allele in our sample was 27.7%. 76 patients [52.1%] were homozygous for the wildtype (T/T), 59 [40.4 %] were heterozygous (T/C) and 11 [7.5%] were homozygous for the C-allele (C/C). The observed genotypic frequencies closely match the expected frequencies according to the Hardy-Weinberg principle (52.2%, 40.1% and 7.7% respectively) for the given allelic frequency.