EXHIBIT 99.1

SIGNATURES OF REPORTING PERSONS

After reasonable inquiry and to the best of our knowledge and belief, the undersigned certify that the information set forth in this Form 4 is true, complete and correct.

March 25, 2013

WARBURG PINCUS PRIVATE EQUITY X, L.P.

By:     Warburg Pincus X, L.P., its general partner

By:     Warburg Pincus X LLC, its general partner

By:     Warburg Pincus Partners, LLC, its sole member

By:     Warburg Pincus & Co., its managing member

By:        /s/ Scott A. Arenare       

Name:   Scott A. Arenare

Title:     Scott A. Arenare, Attorney-in-fact*

WARBURG PINCUS X PARTNERS, L.P.

By:     Warburg Pincus X, L.P., its general partner

By:     Warburg Pincus X LLC, its general partner

By:     Warburg Pincus Partners, LLC, its sole member

By:     Warburg Pincus & Co., its managing member

By:       /s/ Scott A. Arenare    

Name:   Scott A. Arenare

Title:     Scott A. Arenare, Attorney-in-fact*

WARBURG PINCUS X, L.P.

By:     Warburg Pincus X LLC, its general partner

By:     Warburg Pincus Partners, LLC, its sole member     

By:     Warburg Pincus & Co., its managing member

By:       /s/ Scott A. Arenare   

Name:   Scott A. Arenare

Title:     Scott A. Arenare, Attorney-in-fact*

WARBURG PINCUS X LLC

By:     Warburg Pincus Partners, LLC, its sole member     

By:     Warburg Pincus & Co., its managing member

By:       /s/ Scott A. Arenare   

Name:  Scott A. Arenare

Title:    Scott A. Arenare, Attorney-in-fact*

WARBURG PINCUS PARTNERS, LLC

By:     Warburg Pincus & Co., its managing member

By:        /s/ Scott A. Arenare    

Name:   Scott A. Arenare

Title:     Scott A. Arenare, Attorney-in-fact*

WARBURG PINCUS & CO.

By:       /s/ Scott A. Arenare   

Name:  Scott A. Arenare

Title:    Scott A. Arenare, Attorney-in-fact*

WARBURG PINCUS LLC

By:        /s/ Scott A. Arenare   

Name:   Scott A. Arenare

Title:     Managing Director

CHARLES R. KAYE

By:    /s/ Scott A. Arenare   

Scott A. Arenare, Attorney-in-fact*

JOSEPH P. LANDY

By:     /s/ Scott A. Arenare       

Scott A. Arenare, Attorney-in-fact*

* The Power of Attorney given by each of Warburg Pincus & Co., Mr. Kaye and Mr. Landy was previously filed with the U.S. Securities & Exchange Commission on January 15, 2013 as an exhibit to a statement on Schedule 13D/A filed by Warburg Pincus Private Equity X, L.P. with respect to Talon Therapeutics, Inc. and is hereby incorporated by reference.