To determine the relationships among DEC1, HIF-1α and c-Myc expression in tumor specimens, we analyzed a microarray gene expression profiling dataset derived from 285 serous and endometrioid tumors of ovary, peritoneum, and fallopian tube using affynetrix U133 Plus 2 arrays [30] (NCBI GSE9891). Here, BHLHE40 is linked to endometrioid tumor.