Chubb Reports First Quarter Per Share Net Income and Core Operating Income of $3.29 and $3.68, Respectively; Consolidated Net Premiums Written of $12.6 Billion, Up 5.7% in Constant Dollars, with P&C and Life Insurance Up 5.0% and 10.3%; P&C Combined Ratio of 95.7%, or 82.3% Excluding Catastrophe Losses and Prior Period Development