GSK to buy US biotech firm IDRx for up to $1.15 billion
            
        
            
        
        
        
            British drugmaker GSK said today that it would pay up to $1.15 billion to buy Boston-based biopharmaceutical firm IDRx, which is developing a treatment for a rare type of tumour.
        
        
        
        
            
                Business
                 • 13 Jan