This journal is an open access publication that provides readers and their institutions with immediate, worldwide, barrier-free access to the full text of all published papers. Every article in the Journal may be read, downloaded, copied, distributed, printed, searched, or linked to by readers.

This publication allows direct access to its content on the premise that making research freely available to the public would improve global knowledge exchange. We are continuously working with our author communities to select the best choice of license options, Creative Commons Attribution-ShareAlike 4.0 International License., (CC BY-SA).