For example, Module 37 includes four HOX family genes (HOXB2, HOXB4, HOXB6 and HOXB7) that all have been extensively reported to be related with ovarian cancer (Cheng et al., 2005; Ota et al., 2009; Widschwendter et al., 2009; Wu et al., 2007). Here, HOXB4 is linked to ovarian cancer.