Paper Chase is a research database designed to offer abstracts of research articles published in journals that have a highly rated impact factor as determined by ISI Impact Factor and PageRank. Abstracts are organized by date, with the most recently published papers listed first. 

Paper Chase

Patient Referrals: A Linchpin for Increasing the Value of Care.

JAMA. Jul 3, 2014.
Song Z, Sequist TD, Barnett ML.

Department of Health Care Policy, Harvard Medical School, Boston, Massachusetts3Division of General Medicine and Primary Care, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts.