“…Some studies used only one concentration, 33,[38][39][40]43,45,[47][48][49]51,55,56,58,59,66,67 while others evaluated the effect of different concentrations on their cell lines. 9,23,[29][30][31][32]34,36,37,41,42,44,46,50,53,54,57,[60][61][62][63][64][65]68 Most studies showed that the results were dependent on concentrations. 9,23,[29][30][31]34,36,41,42,44,46,…”