ECT

Since 2001, nearly 160 legal actions based on the ECT have been brought by investors claiming their investments had been damaged by green policies such as renewable-energy subsidies, and seeking compensation from governments.

More than half of those given ketamine showed improvement, compared with about 41% for those receiving ECT.

While generally safe and effective, ECT does have drawbacks, including temporary confusion and cognitive impairment.

But even among proponents, there's little consensus as to what mechanism underlies ECT's therapeutic effect.

It comes as a new study has indicated some patients are being misled about the risks associated with ECT.