The national credit crisis has claimed a small Bucks County, PA, hospital devoted to breast-cancer care. Leif Murphy, chief executive officer of Diversified Specialty Institutes, said DSI was "seeking additional capital" to keep the hospital open, but there was only a "remote chance" it would succeed. In a letter to the state Department of Labor and Industry, DSI said it planned to close the Comprehensive Breast Care Institute at DSI of Bucks County, which has 89 employees, on Feb. 4.