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

Altered fractionation: a fractional benefit?

Lancet. Sep 2, 2006;368(9538):819-21.
Wirth L, Allen AM, Machtay M.

Dana-Farber Cancer Institute, Boston, MA 02115, USA. Lori_Wirth@dfci.harvard.edu