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

Noninvasive ventilation.

N. Engl. J. Med.. Dec 11, 1997;337(24):1746-52.
Hillberg RE, Johnson DC.

Department of Respiratory Services, Spaulding Rehabilitation Hospital, Harvard Medical School, Boston, MA, USA.