Edanz guarantees the quality of the work done by our editors. Should you have any concerns about the quality of the edited manuscript we have returned to you, please contact us by email or telephone. We will review the work we have done and respond to you about the issues you raise. The English language-editing our editors do will always improve the chances of your manuscript being accepted for publication. However, peer reviewers sometimes make negative comments about the English used in a paper, even after it has been edited by Edanz. Often, the comments will reflect a particular bias of the reviewer about how they think something should be written. This is especially so when a reviewer understands the author is not a native speaker of English. If your manuscript has not been altered after our editing, and is rejected based only or mainly on its English, we will reedit your manuscript for free. Furthermore, if we are unable to edit the manuscript to your satisfaction after it has been through two rounds of editing, we will not charge you or we will refund any fee already paid.