Sample size calculation
The sample size was calculated with PASS 11 software (NCSS, LLC. Kaysville, Utah, USA). The sample size of 95 for each group achieves 90% power to detect a difference of 100.8 between the null hypothesis and the alternative hypothesis that their means are 499.9 and 600.7 with estimated group standard deviations of 206.4 and 215.7 and with a significance level (alpha) of 0.05 using a two-sided two-sample t-test [