Barkun, A. N., Martel, M., Epstein, I. L., Hallé, P., Hilsden, R. J., James, P. D., Rostom, A., Sey, M., Singh, H., Sultanian, R., Telford, J. J., & von Renteln, D. (2020). the Bowel CLEANsing National Initiative: A Low-Volume Same-Day Polyethylene Glycol (PEG) Preparation vs Low-Volume Split-Dose PEG With Bisacodyl or High-Volume Split-Dose PEG Preparations—A Randomized Controlled Trial. American journal of gastroenterology, 115, 2068–2076. http://access.bl.uk/ark:/81055/vdc_100168589573.0x000044