Peer Reviewed Clinical Flowchart Pain medicine Diagnosing the patient with chronic headache Diarmuid Mccoy, Nicholas Lintzeris, Richard Stark Full text: PDF Copied to clipboard Published in A man with chronic recurrent headaches using codeine We recommend that this flowchart be read in context of the article in which it was published. To access the article, click the link above. Get full access Subscribe for full access to all articles Already a subscriber? Login here. Advertisement Advertisement Advertisement