Exhibit A to Schedule 13G Joint Filing Agreement Pursuant to Rule 13d-1(k)Ing Groep Nv • February 14th, 2011 • Life insurance
Company FiledFebruary 14th, 2011 IndustryThe undersigned persons (the “Reporting Persons”) hereby agree that a joint statement on this Schedule 13G, and any amendments thereto, be filed on their behalf by ING Groep N.V.