Statistical analysis
Data were expressed as the mean±SEM unless otherwise specified.
Statistical analysis was performed using InStat software (GraphPad Software,
San Diego, CA, USA). The normality of the distribution of data was
evaluated using the Kolmogorov–Smirnov test. The equality of the standard
deviations of the groups was assessed with Bartlett's test. Tukey
multiple comparisons test (experiment 1) or t test (experiment 2)