Open Access
Issue
J. Eur. Opt. Soc.-Rapid Publ.
Volume 13, Number 1, 2017
Article Number 22
Number of page(s) 9
DOI https://doi.org/10.1186/s41476-017-0050-z
Published online 09 September 2017

© The Author(s) 2017

Licence Creative CommonsOpen Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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