No CrossRef data available.
Article contents
The author replies
Published online by Cambridge University Press: 21 June 2016
Abstract
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

- Type
- Departments
- Information
- Copyright
- Copyright © The Society for Healthcare Epidemiology of America 1993