RT Journal Article SR Electronic T1 British Society for Rheumatology guideline for diagnosis and treatment of giant cell arteritis JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP practneurol-2020-002615 DO 10.1136/practneurol-2020-002615 A1 Susan P Mollan A1 Sarah L Mackie YR 2020 UL http://pn.bmj.com/content/early/2020/06/30/practneurol-2020-002615.abstract AB