UPDATE 1-Ipsen to buy Clementia Pharmaceuticals in deal worth up to $1.3 bln By: Reuters: Company News February 25, 2019 at 02:10 AM EST * Takeover worth up to $1.31 billion (Adds detail and background) Read More >> Related Stocks: Banco Santander ADR Clementia Pharmaceuticals Inc Immune Design CS Merck & Co