Cigna Completes Combination with Express Scripts, Establishing a Blueprint to Transform the Health Care System

CARL ICAHN: The $67 billion Cigna-Express Scripts merger may 'rival the worst acquisitions in corporate history'

Icahn, with sizable stake in Cigna, to oppose Express Scripts acquisition: WSJ By Reuters

Cigna-Express Scripts: Vertical Integration and PBMs’ Medical-Pharmacy Future (rerun)

Cigna buying Express Scripts isn't likely to cause a revolution but it makes sense

Amazon's entry into health care may have just narrowed with the Cigna-Express Scripts deal

Anthem dumps Express Scripts in favor of starting its own pharmacy-benefit manager

With One Fell Tweet, Citron Cleaves Express Scripts Stock Asunder