Accepted for Publication: March 1, 2012.
Published Online: April 23, 2012. doi:10.1001/archinternmed.2012.1159
Author Contributions: Study concept and design: Razvi, Weaver, and Pearce. Acquisition of data: Razvi and Pearce. Analysis and interpretation of data: Razvi, Butler, and Pearce. Drafting of the manuscript: Razvi and Pearce. Critical revision of the manuscript for important intellectual content: Razvi, Weaver, Butler, and Pearce. Statistical analysis: Razvi, Butler, and Pearce. Study supervision: Razvi and Pearce.
Financial Disclosure: Dr Pearce has received a speaker's fee from Merck Serono.
Funding/Support: Dr Pearce has been funded to work on subclinical thyroid disease by Medical Research Council grant G0500783. Access to the GPRD was funded through the Medical Research Council's license agreement with Medicines and Healthcare products Regulatory Agency.
Disclaimer: This study is based in part on data from the full feature GPRD obtained under license from the UK Medicines and Healthcare Products Regulatory Agency. However, the interpretation and conclusions contained in this study are those of the authors alone.