UPDATE 1-Japan approves three new lung drugs from Western firms
* Approvals for inhaled drugs from GSK, Novartis, SkyePharma * SkyePharma shares up more than 15 percent (Adds detail on Novartis drug, SkyePharma share price jump) LONDON, Sept 20 (Reuters) - Japan has approved three new lung drugs from Western companies, underscoring how the world
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