Scientific Reports 5: Article number: 14229; published online: 18 September 2015; updated: 07 January 2016.

This Article contains typographical errors in Table 2.

Under the column ‘Before Cycling’, the Warburg coefficient (ohm·s−1/2) for samples ‘HPGA-50 (4.9 × 102)’, ‘HPGA-20 (2.1 × 103)’ and ‘GA (4.2 × 103)’ were incorrectly given as ‘HPGA-50 (4.9 × 10−2)’, ‘HPGA-20 (2.1 × 10−3)’ and ‘GA (4.2 × 10−3)’ respectively.

In addition, under the column ‘After Cycling’, the Warburg coefficient (ohm·s−1/2) for samples ‘HPGA-50 (5.4×102)’, ‘HPGA-20 (2.3×103)’ and ‘GA (7.4 × 103)’ were incorrectly given as ‘HPGA-50 (5.4×10−2)‘, ‘HPGA-20 (2.3×10−3)’ and ‘GA (7.4×10−3)’ respectively.