RT Journal Article SR Electronic T1 Easing the pain: challenges and opportunities in headache management JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 77 OP 78 DO 10.3399/bjgp08X264009 VO 58 IS 547 A1 David PB Watson YR 2008 UL http://bjgp.org/content/58/547/77.abstract AB