
Some of the key players in this market are: Abbott (US), Johnson & Johnson Services, Inc. (US), Novartis (Switzerland), GlaxoSmithKline plc.(UK), AstraZeneca (UK), Bayer AG (Germany), Pfizer Inc.(US), Merck & Co., Inc. (US), Sanofi (France), F. Hoffmann-La Roche Ltd (Switzerland), Gilead (US)