Since the legalization of cannabis for recreational use in 2018, an expected boom in Canadian cannabis research has failed to happen, which has led scientists to demand changes in how clinical trials are regulated.

中文翻译：

---

数百名科学家签署信函，认为监管正在扼杀大麻研究


自2018年娱乐用大麻合法化以来，加拿大大麻研究的预期繁荣未能实现，这导致科学家要求改变临床试验的监管方式。