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 40-2012. A 43-year-old woman with cardiorespiratory arrest after a cesarean section.

N. Engl. J. Med.. Dec 27, 2012;367(26):2528-36.
Ecker JL, Solt K, Fitzsimons MG, MacGillivray TE.

Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, USA.