Rapid responses are electronic letters to the editor. They enable our users to debate issues raised in articles published on thebmj.com. Although a selection of rapid responses will be included online and in print as readers' letters, their first appearance online means that they are published articles. If you need the url (web address) of an individual response, perhaps for citation purposes, simply click on the response headline and copy the url from the browser window. Letters are indexed in PubMed.
The MHRA should reveal all the evidence on which it bases its
recommendation to everyone, lay or professional. Accelerated testing as
has been suggested cannot give assurance about either efficacy or safety.