Table 1. Primers used in this study.

Nested PCR	Name	Sequences(5′–3′)	Position (HXB2)
1st PCR	MAW-26	TGGAAATGTGGAAAGGAAGGAC	2147–2166
	RT-21	CTGTATTTCTGCTATTAAGTCTTTTGATGGG	2539–2519 R
2nd PCR	PRO-1	CAGAGCCAACAGCCCCACCA	2946–2961
	RT-20	CTGCCAGTTCTAGCTCTGCTTC	2050–2029 R
For sequencing	PRO-1	CAGAGCCAACAGCCCCACCA	3539–3509
	RTA	GTTGACTCAGATTGGTTGCAC	2147–2166
	RTB	CCTAGTATAAACAATGAGACAC	3462–3441