Sastry, P., Hughes, V., Hayes, P., Vallabhaneni, S. R., Sharples, L., Thompson, M., Catarino, P., Moorjani, N., Vale, L., Gray, J., Cook, A., Elefteriades, J., Large, S. R., & on behalf of the ETTAA collaborators. (2015). The ETTAA study protocol: A UK-wide observational study of 'Effective treatments for thoracic aortic aneurysm'. BMJ Open, 5(6), e008147-e008147. https://doi.org/10.1136/bmjopen-2015-008147