Accepted for Publication: August 9, 2013.
Published Online: October 7, 2013. doi:10.1001/jamainternmed.2013.11312.
Acquisition of data: Taylor, Iqbal, Minassian.
Analysis and interpretation of data: Taylor, Iqbal, Minassian, Sayers, Greenwood, Hamilton, Okosieme, Panicker, Thomas.
Drafting of the manuscript: Taylor, Iqbal, Minassian, Sayers, Draman, Okosieme, Panicker.
Critical revision of the manuscript for important intellectual content: Taylor, Minassian, Greenwood, Hamilton, Okosieme, Panicker, Thomas, Dayan.
Statistical analysis: Taylor, Iqbal, Minassian, Sayers, Greenwood, Thomas.
Conflict of Interest Disclosures: None reported.
Funding/Support: Access to the GPRD was funded through the Medical Research Council’s license agreement with the UK Medicines and Healthcare Products Regulatory Agency.
Role of the Sponsor: UK Medicines and Healthcare Products Regulatory Agency had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Disclaimer: The interpretation and conclusions contained in this study are those of the authors alone.
Correction: This article was corrected online October 10, 2013, for an Author Affiliation omission for Colin Dayan, PhD, FRCP.