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,, "The ETTAA study protocol: A UK-wide observational study of 'Effective treatments for thoracic aortic aneurysm'", BMJ Open, 2015