highly significantp < 0.01
** indicates a highly significant difference at p < 0.01. *** indicates a highly significant difference at p < 0.001. **** indicates a highly significant difference at p < 0.0001. 3.
** indicates a highly significant difference at p < 0.01. *** indicates a highly significant difference at p < 0.001. **** indicates a highly significant difference at p < 0.0001. 3.