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                                    Care Coordination Challenges Among High-Needs, High-Costs Older Adults in a Medigap Plan  
                                
                                
                                Timothy S. Wells PhD,Gandhi R. Bhattarai PhD,Kevin  Hawkins PhD,Yan  Cheng MS,Joann  Ruiz RN, MPH,Cynthia A. Barnowski RN, MBA, MS,Barney  Spivack MD, FACP, CMD,Charlotte S. Yeh MD