Submission Preparation Checklist

All submissions must meet the following requirements.

• This manuscript describes original work, it has not been previously published, nor is it before another journal for consideration (or an explanation has been provided in Comments to the Editor).
• All Authors approved the manuscript and this submission.
• Citation in text: every reference cited in the text is also present in the reference list.
• References are written according to the instruction above. Where available, URLs for internet file references have been provided.
• The submission file is in Microsoft Word document file format.