AbbVie Inc (NYSE:ABBV), Celgene Corporation (NASDAQ:CELG), and Sanofi SA (ADR) (NYSE:SNY) got the approval of the medical advisory committee of the European Union last Friday, allowing the drug makers to sell key brands, at least two of which are estimated to be market blockbusters. AbbVie Inc (NYSE:ABBV) was given a positive review on its Viekirax…