All notices, requests and other communications to either party hereunder shall be in writing (including facsimile transmission or electronic mail) and shall be given, (a) if to Sellas, in accordance with the provisions of the Plan of Merger and (b) if to the Stockholder, to the Stockholder’s address, electronic mail address or facsimile number set forth on a signature page hereto, or to such other address, electronic mail address or facsimile number as the Stockholder may hereafter specify in writing to Sellas.