RESULTS	The mean percentage of Ki-67-stained nuclei in groups A and B was 36.25 + / - 2.31 and 59.44 + / - 3.34 ( + / - SEM ) , respectively ( P < 0.0001 ) , while the percentage of cases with cells expressing Bcl-2 in groups A and B was 23.5 and 77.8 % , respectively ( P < 0.001 ) .\