Diaz-Valdes, J. F.
Bruce, S. A.
Article History
Received: 27 December 2017
Accepted: 26 January 2018
First Online: 26 February 2018
Change Date: 21 December 2018
Change Type: Erratum
Change Details: After publication of the paper, the authors realized that fig. 1 and its caption were incorrect. Here is their corrected versions.