Butler, Nadia http://orcid.org/0000-0002-4938-7870
Quigg, Zara
Bates, Rebecca
Sayle, Madeleine
Ewart, Henrietta
Article History
First Online: 8 November 2019
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: As a routine population survey which falls under ‘usual practice in public health’, and in line with the Health Research Authority guidance, formal ethical approval for the study from a research committee was not sought. All procedures performed in studies involving human participants were in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.