Anyone participated in an Evaril study? Is it a scam?

They ask you for the $150 so they won't lose money in case you drop out or don't send back your journal. It's just a deposit, you'll get it back at the end of the study. Yes it's legit, there's a number you can call, it's in the info packet and on the website. Or call the university. Yep I'm also in the study.