B, MW and KS tests.

Comparison	MW test								KS test
	L2/3		L4		L5		L6		L2/3 Amplitude	L4 Amplitude	L5 Amplitude	L6 Amplitude
	Charge	Frequency	Charge	Frequency	Charge	Frequency	Charge	Frequency
P14 vs. P17	p = 0.2	p = 0.01	*p < 0.001	*p < 0.001	p = 0.01	p = 0.09	*p < 0.001	*p < 0.001	*p < 0.001	*p < 0.001	*p < 0.001	*p < 0.001
P14 vs. P21	p = 0.07	p = 0.01	*p < 0.001	*p < 0.001	*p < 0.001	p = 0.01	*p = 0.007	*p < 0.001	*p < 0.001	p = 0.035	*p < 0.001	*p < 0.001
P14 vs. P30	*p < 0.001	*p < 0.001	*p < 0.001	*p < 0.001	*p = 0.001	*p = 0.002	*p < 0.001	*p < 0.001	*p < 0.001	*p < 0.001	*p < 0.001	*p < 0.001
P17 vs. P30	p = 0.01	*p = 0.001	*p < 0.001	*p < 0.001	p = 0.04	p = 0.01	*p = 0.002	*p = 0.002	*p < 0.001	*p < 0.001	*p < 0.001	*p < 0.001
P21 vs. P30	p = 0.1	p = 0.02	*p = 0.001	*p < 0.001	p = 0.6	p = 0.3	p = 0.01	p = 0.02	p = 0.058	*p < 0.001	*p < 0.001	*p < 0.001
P17 vs. P21	p = 0.5	p = 0.6	p = 0.9	p = 0.8	p = 0.08	p = 0.1	p = 0.3	p = 0.4	*p < 0.001	*p = 0.002	*p < 0.001	p = 0.3

*Statistically significant. Only p values <0.008 are considered significant due to Bonferroni correction for multiple comparisons.