Article Text

Download PDFPDF
Letter
Author's response

Statistics from Altmetric.com

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.

Footnotes

  • Linked article 301795.

  • Competing interests None.

  • Provenance and peer review Commissioned; internally peer reviewed.

Linked Articles

  • PostScript
    Virgilio Galvis Alejandro Tello