RT Journal Article SR Electronic T1 Headache JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 335 OP 343 DO 10.1136/jnnp.2008.159095 VO 8 IS 5 A1 Davenport, Richard YR 2008 UL http://pn.bmj.com/content/8/5/335.abstract AB