All manuscripts are submitted with the understanding that they have not been published elsewhere (except in the form of an abstract or as part of a published lecture or thesis) and are not currently under consideration for publication by another journal. It is the responsibility of the corresponding author to ensure that all authors have contributed to, read and approved the final manuscript for submission. The authors should keep a copy of the manuscript submitted in case of revision, rejection, loss or damage. A decision regarding the acceptance will be made as soon as possible. Accepted manuscripts may be subject to editorial revision without notice.