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

Clinical problem-solving. A patient with syncope.

N. Engl. J. Med.. Sep 05, 2013;369(10):966-72.
Fox MC, Lakdawala N, Miller AL, Loscalzo J.

Department of Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA 02115, USA.