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

Case records of the Massachusetts General Hospital. Case 10-2013. A 30-year-old man with fever, myalgias, arthritis, and rash.

N. Engl. J. Med.. Mar 28, 2013;368(13):1239-45.
Stone JH, Murali MR.

Department of Medicine, Massachusetts General Hospital, Boston, USA.