Footnotes

• Contributors CH had the original idea for the analysis piece. All authors were involved in the design of the study and the interpretation of data. SEG was responsible for the acquisition of data and the original preparation of the manuscript. All authors contributed to the subsequent drafting and revision, and approved the final version. Data were retrieved from the website WhatDoTheyKnow and directly from the MHRA.

• Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests None declared.

• Patient consent Not required.

• Provenance and peer review Not commissioned; externally peer reviewed.