Fig. 1From: Elevated nitric oxide and carbon monoxide concentration in nasal-paranasal sinus air as a diagnostic tool of migraine: a case – control studyA = The receiver characteristic operating (ROC) curve and predicted probabilities for NO (Left). B = The receiver characteristic operating (ROC) curve and predicted probabilities for NO (Right). C = The receiver characteristic operating (ROC) curve and predicted probabilities for CO (Left)Back to article page