While the sample size of this cohort
may seem somewhat limited for a case–control study, it must be noted
that this population was very carefully selected for its homogeneity,
only schizophrenia patients were included in the cohort, no
schizoaffective subjects were included. Additionally, extensive subject
demographics and medical histories were collected for all patients,
supporting the validity of this case–control cohort for this study. After
complete description of the study to the subjects,written informed consent
was obtained. This study was approved by and conducted according
to the guidelines of the University of Wollongong Human Research
Ethics Committee (HE 10/161).