Trustees of Cooley Dickinson Hospital in Northampton have voted to negotiate a deal to join Massachusetts General Hospital, an alliance that would extend the presence of Mass. General and its powerful parent, Partners HealthCare, outside eastern Massachusetts. The merger could send more Cooley Dickinson patients to Boston to receive treatment for cancer, heart failure, and other complicated conditions, boosting business at Mass. General. It might also hurt Baystate Health, the major Springfield health care system.
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