They gave me a form to fill out about participating in a study when I first went there, but the doctor, after seeing me, told me not to fill that part out and that that was just them being selfish; I needed their help, not the other way around.
I would have participated in the study though. They wanted to do scans of depressed people's brains. But then, you couldn't be on meds and they wanted to put me on meds straight away because I was clearly desperate.