control groups associated_with major psychiatric disorders

Subject: control groups
Relation: associated_with
Object: major psychiatric disorders
p-value: —

Evidence from: primary | all sources

Evidence (1 sources)

Lack of association between the A118G polymorphism of the mu opioid receptor gene (OPRM1) and opioid dependence: A meta-analysis. (2009) PMID:23226031 cited

All but two studies excluded individuals with major psychiatric disorders ... from their control groups

confidence: 0.90