LabCorp and Covance Inc. have entered into a definitive agreement under which LabCorp will acquire Covance for approximately $5.6 billion. The combination will capitalize on LabCorp’s industry leadership in medical testing and Covance’s leadership in contract research. The deal has been approved by the boards of directors of both companies and is expected to close in the first quarter of 2015. LabCorp provides medical laboratory testing and services through a national network of primary clinica...