Jump to: Page Content, Site Navigation, Site Search,

You are seeing this message because your web browser does not support basic web standards. Find out more about why this message is appearing and what you can do to make your experience on this site better.

  • BMJ
  • BMJ Journals
  • BMJ Careers
  • BMJ Learning
  • Evidence Centre
  • BMJ Group
BMJ - helping doctors make better decisions

Advanced search

Register for free services | Subscribe | Sign In

  • Home
  • Research
    • Methods and Reporting
  • Education
    • Clinical review
    • Practice
    • Shortcuts
    • Endgames
  • News
  • Comment
    • Editor's choice
    • Editorials
    • Letters
    • Rapid responses
    • Features
    • Observations
    • Head to head
    • Analysis
    • Views & reviews
    • Obituaries
    • Minerva
    • Fillers
    • Blogs
    • Podcast
  • Topics
    • Clinical topics
    • Non-clinical topics
    • Series
    • Theme issues
  • Video
  • Print Issues
    • Last seven days
    • Past weeks (Monday-Sunday)
    • Print issue
    • Rapid responses
    • Polls
    • Debates
    • Blogs
    • Podcasts
    • Video
    • Academic medicine
    • US highlights
    • BMJ USA 2001-2005
  • About BMJ

Home > BMJ 2004;329(7479):1369 (11 December), doi:10.1136/bmj.38281.595718.7C > Website extra


Table

Figure A (pdf)

Figure B (pdf))

Figure C (pdf)

Figure D (pdf)

This Article
  • Abstract
  • Full text
  • Respond to this article
Services
  • Email this article to a friend

What's new
  • Last 7 days
  • Past weeks
  • Current print issue
  • Rapid responses
  • Pandemic flu
Latest blogs
  • Nursing in Sierra Leone
  • Excellence in practice
  • Promoting health literacy
  • Should we help people self-harm?
  • Swine flu and ministries of fear
  • Richard Lehman's journal blog

Find BMJ on:
  • Latest from BMJ
  • BMJ simple search
  • Follow BMJ on twitter
Services
  • Blogs
  • Podcasts
  • Submit an article
  • Subscribe/Activate
  • Email alerts
  • Request permissions
Tools
Email to friend

Print this page

rss feeds for this page
Online poll
Find out more >>
Resources
  • Readers
  • Authors
  • Reviewers
  • Media
  • BMA members
  • Advertising and sponsors
  • Subscribers

Rapid responses for this article

There are no rapid responses for this article.
Print issues
  • Current issue contents
  • Current cover image
  • Past issues
  • Subscribe

Specialist Libraries' Association
top 100 journal



Access jobs at BMJ Careers
Whats new online at Student 

BMJ

Contact us - Privacy policy - Web site terms & conditions - Revenue sources - Site map

HighWire Press - Feedback - Help - © 2009 BMJ Publishing Group Ltd.