Developing a real-world evidence base for prescribed cannabis in the United Kingdom: preliminary findings from Project Twenty21
Project Twenty21 is the UK’s first medical cannabis registry. It began in August 2020 to collect real-world data because randomized trials are hard and NHS prescribing remained rare after medical cannabis was legalised in November 2018. By 12 March 2021, 678 people had joined; most were men and the most…