English: This is the cover image for volume 98 issue 1 (2018), it is an open access journal licensed under the Creative Commons Attribution License 4.0 since late 2014.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
https://creativecommons.org/licenses/by/4.0CC BY 4.0 Creative Commons Attribution 4.0 truetrue
Captions
This is the cover image for volume 98 issue 1 (2018), it is an open access journal