Figure 1From: Low omega-6 vs. low omega-6 plus high omega-3 dietary intervention for Chronic Daily Headache: Protocol for a randomized clinical trial Study flow diagram for the exploratory analgesic dietary intervention for chronic daily headache, May 2010. Abbreviations: HUFA, highly-unsaturated fatty acid; HIT-6, Headache Impact Test; MIDAS, Migraine Disability Assessment Questionnaire; BSI-18, Brief Symptom Inventory.Back to article page