Prime Minister Syed Yusuf Raza Gilani Wednesday left here for Davos to attend the annual summit of the World Economic Forum being held from January 25-29. He was accompanied by Foreign Minister Hina Rabbani Khar, Finance Minister Abdul Hafeez Sheikh and other officials while he was seen off at the air port by Interior Minister Rehman Malik. Talking to mediapersons before his departure at the Chaklala Air Base, the Prime Minister said WEF is a golden opportunity to meet the world leaders and business leaders. He said since 1990 the WEF has been an effective platform. President Zardari, former Prime Minister Benazir Bhutto and he himself have attend this important forum.