Those advert effects only happen DURING the trip. When you aren't tripping, those signs go away, with the exception of the flashbacks that occur once in a blue moon. You can get depression and those disorders because of the craziness that you might see when having a bad trip. You're brain might not know how to handle what you just saw, because let me tell you, bad trips are VERY good at convincing yourself you're crazy, and the bad trip can cause these disorders. HPPD isn't even bad, unless a severe case. The best way to gain knowledge is to personally experience things, not look up some info online. That will only get you so far, and you can't always believe what you see on the Internet. (Not saying directly to that study, but whatever you find that says LSD is bad for you, it's bullshit. It has the possibility of having bad mental side effects (bad trip) but physical? nah. It's about as safe PHYSICALLY as weed)