Letters
The pill and thrombosis
Study subject to unmeasured confounders and biases
BMJ 2011; 342 doi: https://doi.org/10.1136/bmj.d3349 (Published 31 May 2011) Cite this as: BMJ 2011;342:d3349
Log in
Log in using your username and password
Log in through your institution
Subscribe from £157 *
Subscribe and get access to all BMJ articles, and much more.
* For online subscription
Access this article for 1 day for:
£30 / $37 / €33 (excludes VAT)
You can download a PDF version for your personal record.