Exhibit 1

JOINT FILING AGREEMENT

We, the signatories of this Statement on Schedule 13G/A to which this Agreement is attached, hereby agree that such Statement is, and any amendments thereto filed by either of us will be, filed on behalf of each of us.

Dated: June 12, 2009	TEMASEK HOLDINGS (PRIVATE) LIMITED
	By:	/s/ Lena Chia Yue Joo
		Name:	Lena Chia Yue Joo
		Title:	Managing Director, Legal & Regulations
Dated: June 12, 2009	FULLERTON MANAGEMENT PTE LTD
	By:	/s/ Lena Chia Yue Joo
		Name:	Lena Chia Yue Joo
		Title:	Director
Dated: June 12, 2009	TEMASEK LIFE SCIENCES PRIVATE LIMITED
	By:	/s/ Goh Yong Siang
		Name:	Goh Yong Siang
		Title:	Director
Dated: June 12, 2009	V-SCIENCES INVESTMENTS PTE LTD
	By:	/s/ Choo Soo Shen Christina
		Name:	Choo Soo Shen Christina
		Title:	Director