Mason, Samantha J
Downing, Amy
Wright, Penny
Hounsome, Luke http://orcid.org/0000-0001-5231-1394
Bottomley, Sarah E
Corner, Jessica
Richards, Mike
Catto, James W
Glaser, Adam W
Article History
Received: 18 October 2017
Revised: 21 March 2018
Accepted: 22 March 2018
First Online: 14 May 2018
Competing interests
: The authors declare no competing interests.
: Permission to approach patients without informed consent was given by the Health Research Authority (ref ECC 5-02(FT7)/2012). Consent to participate was implied through return of completed questionnaires.
: The aggregated results of data analysis, STATA files and output for data extraction are available from the authors on request. Individual patient-level data used to generate results are not freely available, but may be applied for through the PHE Office for Data Release (ODR).