Exhibit 1

Agreement of Joint Filing

Pursuant to 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, the undersigned persons hereby agree to file with the Securities and Exchange Commission the Statement on Schedule 13D (the “Statement”) to which this Agreement is attached as an exhibit, and agree that such Statement, as so filed, is filed on behalf of each of them.

IN WITNESS WHEREOF, the undersigned have executed this Agreement.

Dated: March 16, 2015

QVT FINANCIAL LP			QVT FUND V LP
By:	QVT Financial GP LLC, its General Partner		By:	QVT Associates GP LLC, its General Partner
By:	/s/ Daniel Gold		By:	/s/ Daniel Gold
	Name:	Daniel Gold		Name:	Daniel Gold
	Title:	Managing Member		Title:	Managing Member
By:	/s/ Tracy Fu		By:	/s/ Tracy Fu
	Name:	Tracy Fu		Name:	Tracy Fu
	Title:	Managing Member		Title:	Managing Member
QVT FINANCIAL GP LLC			QVT ASSOCIATES GP LLC
By:	/s/ Daniel Gold		By:	/s/ Daniel Gold
	Name:	Daniel Gold		Name:	Daniel Gold
	Title:	Managing Member		Title:	Managing Member
By:	/s/ Tracy Fu		By:	/s/ Tracy Fu
	Name:	Tracy Fu		Name:	Tracy Fu
	Title:	Managing Member		Title:	Managing Member

Page 10 of 11 pages

Appendix A

Covered Persons

Name of Covered Person	Principal Business Address	Principal Occupation
Daniel Gold	QVT Financial LP 1177 Avenue of the Americas, 9th Floor New York, New York 10036	Investment Management
Nicholas Brumm	QVT Financial LP 1177 Avenue of the Americas, 9th Floor New York, New York 10036	Investment Management
Arthur Chu	QVT Financial LP 1177 Avenue of the Americas, 9th Floor New York, New York 10036	Investment Management
Tracy Fu	QVT Financial LP 1177 Avenue of the Americas, 9th Floor New York, New York 10036	Investment Management

Page 11 of 11 pages