The second and third most abundant categories were also similar in theme across organs, with nine and 11 sets associated with growth factors (e.g. transforming growth factor-α and amphiregulin pathways), and four and six sets being cancer-related (e.g. “ERBB/VEGFR/Akt signaling in breast cancer” and “Hodgkin lymphoma”). This evidence concerns the gene KDR and breast cancer.