‡a
Rheumatoid arthritis in a policy perspective, a registry for research and better treatment of Albertans, 2015:
‡b
PDF page 4 (authors: Liam Martin, Division of Rheumatology, Department of Medicine, University of Calgary)
‡u
http://epe.lac-bac.gc.ca/100/200/300/institute_health_economics/rheumatoid/index.html