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Abbott Amgen AstraZeneca Biogen biotech Bristol-Myers Squibb buyouts cancer China diabetes drug stocks drug trials earnings Elan Eli Lilly FDA Genentech generics Genzyme Gilead GSK H1N1 healthcare reform JNJ layoffs Lilly M&A Merck Novartis partnerships patents Pfizer Pharma CEOs Roche Sanofi-Aventis Schering-Plough swine flu Teva vaccines Wyeth