Article Text

Download PDFPDF
The bare essentials

Statistics from

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.


  • Provenance and peer review Commissioned; externally peer reviewed.

  • Competing interests CJF is the recipient of unrestricted educational grants from Allergan and has also acted as a consultant for Allergan and Medtronic.

Other content recommended for you