(Reporting by Natalie Grover in Bengaluru; Editing by Sriraj Kalluvila)   Zimmer Biomet Holdings Inc (ZBH.N) agreed to buy fellow medical device maker LDR Holding Corp (LDRH.O) for about $1 billion deal to expand in the market for treating spine disorders. The $37 per share offer represents a premium of about 64 percent to LDR’s […]