1. Comparing triggers to visual disturbances among individuals with positive vs negative experiences of hallucinogen‐persisting perception disorder (HPPD) following LSD use. (27th June 2017) Authors: Lev‐Ran, Shaul; Feingold, Daniel; Goodman, Craig; Lerner, Arturo G. Journal: American journal on addictions Issue: Volume 26:Number 6(2017) Page Start: 568 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗