Reason for withdrawal from publication
Withdrawn from publication in August 2007, pending update and revision.
The editorial group responsible for this previously published document have withdrawn it from publication.
What's new
| Date | Event | Description |
|---|---|---|
| 30 October 2008 | Amended | Converted to new review format. |
Sources of support
Internal sources
Peking University, Evidence‐based medicine programme (No. 89300‐246156097), China.
External sources
No sources of support supplied
Withdrawn from publication for reasons stated in the review