A proposed charter for clinical trial data monitoring committees: helping them to do their job well. Lancet 365(9460): 711-22. https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(05)17965-3/abstract
Charter, developed with funding from the National Institute for Health Research (NIHR) in the UK to guide the work of Data Monitoring Committees for randomised trials.