Authors are encouraged to submit high quality, eye catching illustrations or color images for consideration as the issue covers of the journal. Please design the image to be within the area of 19 cm (width) x 15 cm (height). Cover image can be submitted in the manuscript login page (following the link of "Suggest a cover image" at the bottom of the page) after the manuscript is scheduled for publication. The image must be from or related to the paper that is scheduled for publishing. The file can be in the format of PDF, Word, PowerPoint, jpg, or png. Please notify our publishing team after submitting the file.
The cover for each issue is selected by our publishing team or editors, and the decision is final.