Exclusive: Lazard works with Sanofi on $12.7 billion animal health unit deal - sources

LONDON/NEW YORK/FRANKFURT (Reuters) - Investment bank Lazard is working with Sanofi's management to prepare a sale or listing of its Merial animal health unit, aiming to land the leading advisory job for the deal, which could value the business at up 12 billion euros ($12.7 billion), sources familiar with the matter said.