Copyright

This is an open-access article distributed under the terms of the Creative Commons Attribution-ShareAlike 4.0 International.

 

This license lets others remix, adapt, and build upon your work even for commercial purposes, as long as they credit you and license their new creations under the identical terms. This license is often compared to “copyleft” free and open source software licenses. All new works based on yours will carry the same license, so any derivatives will also allow commercial use.