SERONO S.A. and THE BANK OF NEW YORK As Depositary and OWNERS AND BENEFICIAL OWNERS OF AMERICAN DEPOSITARY RECEIPTS Deposit Agreement Dated as of July 26, 2000 EXHIBIT A Form of ReceiptDeposit Agreement • June 4th, 2007 • Merck Serono S.A. • Biological products, (no disgnostic substances) • New York
