| Original language | English |
|---|---|
| Pages (from-to) | 1545-1546 |
| Number of pages | 2 |
| Journal | The Lancet |
| Volume | 378 |
| Issue number | 9802 |
| DOIs | |
| Publication status | Published - 2011 |
Bibliographical note
Funding Information:This study was funded by the UK Department of Health Policy Research Programme , grant numbers 019/0047 and 039/0031 . The views expressed in this letter are those of the authors and not necessarily those of the Department of Health. We declare that we have no conflicts of interest.