SciencePG's CrossMark Policy

CrossMark is a multi-publisher initiative to help readers identify the current version of a published document.

By applying the CrossMark logo, Science Publishing Group (SciencePG) commits to maintaining its published content and informing readers of any updates.

Clicking the CrossMark logo on a document will show its current status and may also provide additional information about the publication record.

The CrossMark logo appears on current and future journal content hosted on the official SciencePG website.