PMC:3727988 / 4913-5407 JSONTXT

{"project":"2_test","denotations":[{"id":"23815568-22752568-60544998","span":{"begin":143,"end":145},"obj":"22752568"}],"text":"The opioid system plays an important role in various biological functions including analgesia, drug response and pain reduction. Menon et al. [12] studied the influence of polymorphism in gene coding for the μ-opioid receptor highlighting the association between the OPRM1 A118G SNP and head pain severity in a clinical cohort of 153 female migraineurs with aura. In particular, G118 allele carriers were more likely to be high pain sufferers compared to homozygous carriers of the A118 allele."}