Text and Data Mining valid from 2018-10-01
Received: 20 July 2018
Accepted: 18 September 2018
First Online: 12 October 2018
Change Date: 5 November 2018
Change Type: Correction
Change Details: In the version of this Article originally published, in the Methods section ‘Analytical calculation and FEM simulation’ the first equation was incorrect and has now been replaced. In addition, in the section ‘Conclusions’, the packing density mistakenly read ‘5,000 leg pairs per cm<sup>2</sup>’ and has now been corrected to read ‘5,500 leg pairs per cm<sup>2</sup>’.
: The authors declare no competing interests.