(AGI) Cairns, Sept 20 - The G20 meeting of finance ministershas begun in Cairns, Australia, ahead of November's leaders'summit. Measures to bolster global economic growth by 2 percentin five years will be the focus of debate. Growth has slowedsince the last summit in February, especially in the euro area,which may be at risk of deflation. The Japanese, Chinese andSouth Korean finance ministers met on Friday for three-waytalks. . .