Yes. Came here to to say this has been done before. It was too much for the Establishment to stomach. Ram Dass, Tim Leary’s associate (Richard Alpert at the time) talks about it here - https://podcasts.apple.com/us/podcast/ram-dass-here-and-now/...

I am no fan of Timothy Leary, I think he put the cause of Psychedelics back decades. He was also a very flawed researcher, which effected this study.

Nevertheless, it was ground breaking for 1962 and had a huge impact.

Not so significant in the twenty first century.