1. Birmingham VA Medical Center; Department of Medicine; Faculty Office Tower 805B 510 20th Street South Birmingham AL USA 35294
2. University of Ottawa Heart Institute; Cardiovascular Research Methods Centre; 40 Ruskin Street Room H-2265 Ottawa ON Canada K1Y 4W7
3. University of Ottawa; Bruyère Research Institute; 43 Bruyère St Annex E, room 302 Ottawa ON Canada K1N 5C8
4. Copenhagen University Hospital, Bispebjerg og Frederiksberg; Musculoskeletal Statistics Unit, The Parker Institute; Nordre Fasanvej 57 Copenhagen Denmark DK-2000
5. University of Alabama at Birmingham; Department of Medicine - Rheumatology; Birmingham USA
6. Ottawa Hospital Research Institute (OHRI), The Ottawa Hospital - General Campus; Centre for Practice-Changing Research (CPCR); 501 Smyth Road, Box 711 Ottawa ON Canada K1H 8L6
7. University of Alabama at Birmingham; Department of Clinical Immunology and Rheumatology; Faculty Office Tower, Suite 805, 510 20th Street South Birmingham AL USA 35294
8. Faculty of Medicine, University of Ottawa; Department of Medicine; Ottawa ON Canada K1H 8M5
9. University of Ottawa; Department of Epidemiology and Community Medicine; Room H1281 40 Ruskin Street Ottawa ON Canada K1Y 4W7