Clinical endocannabinoid deficiency (CECD): Can this concept explain therapeutic benefits of cannabis in migraine, fibromyalgia, irritable bowel syndrome and other treatment-resistant conditions? (PubMed)

Effects of anandamide in migraine: data from an animal model (PubMed)

Cannabinoids and hallucinogens for headache (PubMed)

The endocannabinoid system and migraine (PubMed)

Variations in the cannabinoid receptor 1 gene predispose to migraine (PubMed)