Received: 29 August 2018
Accepted: 13 August 2019
First Online: 20 August 2019
Ethics approval and consent to participate
: Relevant ethical approval was obtained. This type of surveillance required Health Research Authority (HRA) approval as cases may be reported from any NHS Trust that works with children across the UK. In addition, Section 251 approval is required from the Confidentiality Advisory Group (CAG) to permit clinicians to report anonymous case note information without patient/parent consent provided there is no requirement or expectation for additional patient contact as a result of the study.Health Research Authority (HRA) approval – HRA-IRAS reference 159209 Section 251 Confidentiality Advisory Group (CAG) – CAG reference 15/CAG/0184.CRIS was approved as an anonymised data resource for secondary analysis by Oxfordshire Research Ethics Committee (08/H0606/71 + 5). This project was reviewed and approved by the CRIS patient-led oversight committee (CRIS project ref.:961).
: Not applicable.
: The authors declare that they have no competing interests.