. Data are mean±S.E.M. of *n*=0 independent experiments carried out in triplicate. Statistically significant differences are labeled as \**P*\<0.00, \*\**P*\<0.00, \*\*\**P*\<0.000 and \*\*\*\**P*\<0.0000, compared with untreated cells using Student\'s unpaired two-tailed *t*-test; ns, nonsignificant](cddis0000000f0){#fig0}  ![