Endogenous opioid activity is associated with obsessive-compulsive symptomology in individuals with a family history of alcoholism.
Mangold DL, Peyrot M, Giggey P, Wand GS. Endogenous opioid activity is associated with obsessive-compulsive symptomology in individuals with a family history of alcoholism. Neuropsychopharmacology. 2000 Jun; 22(6):595-607.