Erratum: Mechanics of tunable helices and geometric frustration in biomimetic seashellsQiaohang Guo, Zi Chen, Wei Li, Pinqiang Dai, Kun Ren, Junjie Lin, Larry A. Taber and Wenzhe ChenEPL, 106 1 (2014) 19902DOI: https://doi.org/10.1209/0295-5075/106/19902