FOSTER CITY, Calif. & LONDON--(BUSINESS WIRE)--Gilead Sciences, Inc. (Nasdaq:GILD) and GlaxoSmithKline (NYSE:GSK) today announced a licensing agreement to commercialize Viread® (tenofovir disoproxil fumarate) for the treatment of chronic hepatitis B (HBV) infection in adults in five countries in Asia. The companies’ combined commercialization activities will expand access to Viread for the treatment of HBV, once approved, to patients in Asia where the prevalence in most countries is greater than 8 percent.