Contract

Exhibit 99.1

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the Common Stock of Hana Biosciences, Inc. and that this Agreement be included as an Exhibit to such joint filing.  This Agreement may be executed in any number of counterparts all of which taken together shall constitute one and the same instrument.

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement this 11th day of June 2010.

	DEERFIELD CAPITAL, L.P.
	By:	X.X. Xxxxx Capital LLC, General Partner
	By:	/s/ Xxxxxx Xxxxxx
	Name:	Xxxxxx Xxxxxx
	Title:	Authorized Signatory

	DEERFIELD SPECIAL SITUATIONS FUND, L.P.
	By:	Deerfield Capital, L.P., General Partner
	By:	X.X. Xxxxx Capital LLC, General Partner
	By:	/s/ Xxxxxx Xxxxxx
	Name:	Xxxxxx Xxxxxx
	Title:	Authorized Signatory

	DEERFIELD PRIVATE DESIGN FUND, L.P.
	By:	Deerfield Capital, L.P., General Partner
	By:	X.X. Xxxxx Capital LLC, General Partner
	By:	/s/ Xxxxxx Xxxxxx
	Name:	Xxxxxx Xxxxxx
	Title:	Authorized Signatory

	DEERFIELD PRIVATE DESIGN INTERNATIONAL, L.P.
	By:	Deerfield Capital, L.P., General Partner
	By:	X.X. Xxxxx Capital LLC, General Partner
	By:	/s/ Xxxxxx Xxxxxx
	Name:	Xxxxxx Xxxxxx
	Title:	Authorized Signatory

	DEERFIELD MANAGEMENT COMPANY, L.P.
	By:	Xxxxx Management LLC, General Partner
	By:	/s/ Xxxxxx Xxxxxx
	Name:	Xxxxxx Xxxxxx
	Title:	Authorized Signatory

	DEERFIELD SPECIAL SITUATIONS FUND INTERNATIONAL LIMITED
	By:	/s/ Xxxxxx Xxxxxx
	Name:	Xxxxxx Xxxxxx
	Title:	Authorized Signatory
	XXXXX X. XXXXX
	/s/ Xxxxxx Xxxxxx
	Xxxxxx Xxxxxx, Attorney-in-Fact