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. Endoscopy activity and COVID-19: Bsg and JAG guidance – update 22.03.20, 2020. Available: https://www.bsg.org.uk/covid-19-advice/endoscopy-activity-and-covid-19-bsg-and-jag-guidance/
2. British Society of Gastroenterology (BSG)
. Gi endoscopy activity and COVID-19 – next steps, 2020. Available: https://www.bsg.org.uk/covid-19-advice/gi-endoscopy-activity-and-covid-19-next-steps/ [Accessed 02 Apr 2020].
3. British Society of Gastroenterology (BSG)
. BSG-JAG summary recommendations for PPE in endoscopy: protecting staff, patients and the PPE supply chain, 2020. Available: https://www.bsg.org.uk/covid-19-advice/bsg-jag-summary-recommendations-for-ppe-in-endoscopy-protecting-staff-patients-and-the-ppe-supply-chain/
4. Newton I
. Philosophiæ Naturalis Principia Mathematica. (first published 1687) available at the British library collection. Available: https://www.bl.uk/collection-items/newtons-principia-mathematica
5. Scottish Government
. Health screening programmes paused, 2020. Available: https://www.gov.scot/news/health-screening-programmes-paused/