“…Therefore, more than 4 mice in each group are sufficient to meet the requirement of statistical power. To reduce the error and improve the reliability of the results, we generally used 6-10 mice per group following the previous studies 38 , 39 , 40 and the suggestions of in vivo experiments. 41 6-10 mice per group had sufficient statistical power for making a valid test according to the sample size calculation described by Charan and Kantharia.…”