Article Takedown/Update Request

This is an update request for the document LETTERS, NOTES, AND ANSWERS TO CORRESPONDENTS by

Your paper was deposited in PubMed Central and appears online at http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2514003
Before we are able to make any updates or deletions, you must ensure that the original record at this location is updated/removed.