Science Publishing Group publishes all its journals in full open access format. The scientific community and the general public can unlimitedly and immediately access all content published in our journals for free as soon as it is published on the Internet. This means that Science Publishing Group does not have any income from selling subscriptions to print or online versions of its journals. Therefore, Science Publishing Group needs to defray its editorial and production costs by collecting article processing charges (APC) from authors' institutes or research funding bodies. Science Publishing Group is committed to keep its open access publication charges at a minimum level.

We believe that immediate, worldwide, barrier-free, open access to the full text of research articles is in the best interests of the scientific community.