Erratum to: Complex Intell. Syst. DOI 10.1007/s40747-015-0003-3

When the article was published unfortunately the Creative Commons Attribution (CC-BY) 4.0 license information was missing in the article. This has now been corrected.

The correct copyright line is as follows:

\(\copyright \) The Author(s) 2016. This article is published with open access at Springerlink.com

The correct license text is as follows:

Open 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.