PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 27064247-1 2016 BACKGROUND: Polymorphisms in genes such as DAT1, 5HTTLPR, D4DR4, and MAO-A have been linked to attention deficit hyperactivity disorder (ADHD) and susceptibility for opiate addiction. Opiate Alkaloids 166-172 monoamine oxidase A Homo sapiens 69-74