DEERFIELD, Ill.--(BUSINESS WIRE)--Dade Behring Holdings, Inc. (NASDAQ:DADE), the world’s largest company dedicated solely to clinical diagnostics, and Siemens, the first and currently only full-service diagnostics company, today announced that they have entered into a definitive merger agreement under which Siemens will acquire all of the outstanding shares of Dade Behring for $77.00 per share in cash.