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

Cost-effectiveness of pneumococcal vaccine

JAMA. Jul 26, 2000;284(4):440-1.
Lieu T, Ray GT, Black S, Shinefield H, Butler J, Miller M.

Harvard Pilgrim Health Care, Boston, Mass.