*Indicates the percentage of cores that displayed Postn expression by the cancer epithelia (see Figure 1G). #The AR expression scores of the three cores were reported to range between 5 and 30% positivity by the manufacturer. §All but three cores were reported to range between 1 and 50% positivity by the manufacturer. Expression levels were reported as variable. TMA, tissue microarray; Postn, periostin; AR, androgen receptor.