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 5-2013. A 52-year-old woman with a mass in the thyroid.

N. Engl. J. Med.. Feb 14, 2013;368(7):664-73.
Wirth LJ, Ross DS, Randolph GW, Cunnane ME, Sadow PM.

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