A genetic association between NOTCH4 and schizophrenia has previously been
proposed(1). Unsing all markers previously shown to be associated, we found
no evidence for such in three independent family-based samples (n=519 pare
nt-offspring trios), and a case-control sample derived from the same ethnic
background as the original observaton, These data strongly suggest that NO
TCH4 is not a significant susceptibility allele for schizophrenia.