Eurozone first-quarter growth came in at a much lower-than-expected 0.2 percent, official data showed on Thursday, while the fourth-quarter performance was revised down, stoking concerns the recovery remains very weak. Eurostat said the 18-nation eurozone grew 0.2 percent in the three months to March, short of analyst forecasts for 0.4 percent, while fourth quarter 2013 was cut to 0.2 percent from the initially given 0.3 percent.