title: The Authors Respond.
authors.affiliation: Health eResearch Centre, Farr Institute, Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom, matthew.sperrin@manchester.ac.uk School of Health Related Research, University of Sheffield, Sheffield, United Kingdom Health eResearch Centre, Farr Institute, Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom Institute of Cancer Sciences, Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom Health eResearch Centre, Farr Institute, Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom.
authors.forename: Matthew
authors.initials: M
authors.lastname: Sperrin
authors.forename: Jane
authors.initials: J
authors.lastname: Candlish
authors.forename: Ellena
authors.initials: E
authors.lastname: Badrick
authors.forename: Andrew
authors.initials: A
authors.lastname: Renehan
authors.forename: Iain
authors.initials: I
authors.lastname: Buchan