GENEVA, Oct 7 (Reuters) - Swiss drugmaker Roche Holding AG (ROG.VX: Quote, Profile, Research) is not planning to raise its roughly $3 billion takeover offer for Ventana Medical Systems Inc. (VMSI.O: Quote, Profile, Research), a Roche executive told Switzerland’s NZZ am Sonntag newspaper on Sunday. Juergen Schwiezer, who will replace Severin Schwan as head of Roche’s diagnostics division in January, said he expected Ventana shareholders would eventually accept the offer first made in June.
