PITTSBURGH--(BUSINESS WIRE)--Cellumen, Inc., a discovery toxicology company, and the Drug Safety Executive Council (DSEC), a peer-to-peer membership to advance the development of better and safer medicines, today announced findings from “Using In Vitro Methods to Predict In Vivo Toxicity: Where Are We, Where Do We Need to Go?” a webinar held on Jan. 15, 2009.