evidence: Participants who viewed a video without drug risk information thought that the website placed more emphasis on benefits, compared with participants who viewed the video with drug risk information (P≤.01).
intervention: websites presented a video of a personal testimonial, an informational mechanism of action- video  viewed a video without drug risk information
comparator:  viewed the video with drug risk information 
outcome: patients thought that the drug was less effective in the acid reflux sample