MILAN — Four-time Italian Prime Minister Silvio Berlusconi spent the night in a Milan hospital to have tests on a swollen knee, sources said on Friday, confirming reports in the Italian media. The 77-year-old billionaire media magnate checked into San Raffaele hospital on Thursday evening, the sources close to the situation said, without giving further details on his condition. Ansa state news agency reported the news citing sources at the hospital. – Reuters