Table 1. The sequences of primers used for real-time PCR.

Gene	Primer sequence	Product length
HIF-1α	Forward 5′-TCTGGGTTGAAACTCAAGCAACTG- 3′	150 bp
	Reverse 5′- CAACCGGTTTAAGGACACATTCTG-3′
VEGF	Forward 5′-TCACAGGTACAGGGATGAGGACAC- 3′	72 bp
	Reverse 5′-CAAAGCACAGCAATGTCCTGAAG-3′
β-actin	Reverse 5′-CAAAGCACAGCAATGTCCTGAAG-3′	186 bp
	Reverse 5′-CTAAGTCATAGTCCGCCTAGAAGCA-3′