RESULTS	The change in mean LSST performance from pre - to post-LIST was better in the CHO-E trial ( 11 + / - 45 vs -16 + / - 42 % ; P < 0.01 ) but not significantly different for the LSPT performance ( -1 + / - 10 % ( CHO-E ) vs -6 + / - 13 % ( PLA ) , P = 0.13 ) .\