On September 29, 2009, the U.S. Court of Appeals for the Tenth Circuit upheld the Colorado District Court’s holding that a hospital has no antitrust duty to share its facilities, and thereby affirmed the grant of summary judgment for the hospital against a complaining physician. Four Corners Nephrology Assocs. v. Mercy Med. Ctr. of Durango, No. 08-1231 (10th Cir., Sept. 29, 2009). The physician-plaintiff had alleged that the defendant-hospital’s decision to deal exclusively with its in-house nephrologist amounted to illegal monopolization of the nephrology services market.