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

Retrospective. Paul C. Zamecnik (1912-2009).

Science. Dec 04, 2009;326(5958):1359.
Isselbacher KJ.

Massachusetts General Hospital Center for Cancer Research, Harvard Medical School, Charlestown, MA 02129, USA.