Prior to submission, authors who believe their manuscripts would benefit from professional editing are encouraged to use a language-editing service, such as the ones described at the following web sites:

• www.americanjournalexperts.com
• www.asiascienceediting.com
• www.biomedicalediting.com
• www.biomeditor.com
• www.biosciencewriters.com
• www.bluepencilscience.com
• www.bostonbioedit.com
• www.internationaledit.com
• www.internationalscienceediting.com
• www.mstediting.com
• www.oleng.com.au
• www.prof-editing.com
• www.sci-edit.com
• www.scitechedit.com
• www.stallardediting.com