Background There are many studies with different results that examine the association
between Catechol‐O‐MethylTransferase (COMT) gene single‐nucleotide polymorphisms …

Materials and methods We searched candidate genes from the schizophrenia database and
performed a comprehensive meta-analysis using all the available data up to August 2017 …

Genetics plays a significant role in smoking behaviours and abstinence. In this genetics sub-
study, we evaluated treatment-seeking Caucasian smokers (n= 374) receiving bupropion …

Introduction: As the share of elderly in the population is increasing, so is the presence of
depression and anxiety in this group, including in Brazil. There are studies suggesting …

~ People with fast COMT variants break down neurotransmitters more quickly, while slow
COMT increases neurotransmitter levels. These genetic differences can impact attention to …

Background: Drug addiction is a serious neurological disorder that is significantly associated
with mortality and morbidity. It is accompanied by social, economic, and health problems for …