Statistical Analysis By using the Student's two-tailed t-test, quantitative data were expressed as mean+ standard deviation and compared. X2 and Fisher's exact test were used for the comparison in qualitative variables wherever appropriate. The reported p values were implemented against two sided tests, wherever appropriate. P-value < 0.05 was considered significant. All analyses were conducted using SPSS 12.0.1C (SPSS Inc., Chicago, IL, USA).