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

Activated vitamin D sterols in kidney disease.

Lancet. Feb 16, 2008;371(9612):542-4.
Thadhani R.

Renal Unit and Center for D-Receptor Activation Research, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.