The authors regret the following errors, which appear in their published article:
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1.
On page 2 (p1084), section 2.4, 1st para, line 3, the text currently reads: “A bandpass filter (20–500 Hz) was applied without notch filtering.” It should read: “A bandpass filter (20–500 Hz) was applied with 50 Hz notch filtering.”
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2.
On page 6 (p1088), section 4 (Discussion), paras 4 (line 8) and 5 (line 1): the published references to Fig. 4 are wrong and in both instances should make reference to Fig. 3.
The authors would like to apologise for any inconvenience caused.
