Stem Cell Sciences Signs 5 Yr Pfizer Service Agreement <a href="http://custom.marketwatch.com/custom/tdameritrade-com/html-story.asp?guid" target="_blank">http://custom.marketwatch.com/custom/tdameritrade-com/html-story.asp?guid</a>={4177e50d-1223-428e-b0dd-86a860f05c3e}