Johnson & Johnson and Pfizer topped a 2013 ranking of pharmaceutical companies based on market capitalization, as they did last year. Novartis, Roche Holding and Sanofi took the third, fourth and fifth spots, respectively. Rounding out the top 10 were Merck & Co., GlaxoSmithKline, Bayer, Bristol-Myers Squibb and AbbVie.

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