Instead, they parsed the data in an effort to find positive results by first dividing the studies into those that used a case-control method versus those that were family based, then they further divided the family-based studies by the ethnicity of the subjects. When looking at study data after the fact, one can always find subgroups that give the appearance of a positive result. It is hard to imagine a reason that one would expect opposite results for case-controlled studies versus family-based studies. Moreover, the authors’ suggestion that the Val allele confers some risk factor for schizophrenia in those of European descent but not in those of Asian descent has no scientific basis whatsoever and, in my opinion, enters the realm of eugenics.