1. Commissioning guide: gallstone disease 2013. Association of upper gastrointestinal surgeons of Great Britain and Ireland surgeons, Royal College of Surgeons. http://www.rcseng.ac.uk/
2. Hospital Episode Statistics England. Procedures and interventions, 2012–13. http://www.hscic.gov.uk/catalogue/PUB12566/hosp-epis-stat-admi-proc-2012-13-tab.xlsx . Accessed 28 Oct 2014
3. Sinha S, Hofman D, Stoker DL, Friend PJ, Poloniecki JD, Thompson MM, Holt PJ (2013) Epidemiological study of provision of cholecystectomy in England from 2000 to 2009: retrospective analysis of Hospital Episode Statistics. Surg Endosc 27(1):162–175
4. McWhinnie D, Smith I, Skues M, Hammond C, Deakin M, Hopgood G (2010) Handbook of day case laparoscopic cholecystectomy, 2nd edn. British Association of Day Surgery
5. Commissioning guide: Groin hernia 2013. Association of surgeons of Great Britain and Ireland, British Hernia Society, Royal College of Surgeons. http://www.rcseng.ac.uk/