ERBB4 and schizophrenia: Given the absence of identification of an ErbB4 del.3 CYT-1 transcript, we conclude that a mechanism of association of schizophrenia-risk polymorphisms (rs707284, rs839523 and rs7598440) to CYT-1 expression traits in the brain in schizophrenia [7] is unlikely related to exon 3 skipping.