1. Siriraj Hospital, Mahidol University; Rheumatology Division, Department of Medicine; 2 Prannok road, Siriraj hospital, Bangkoknoi Bangkok Thailand 10700
2. CHAUQ-Hôtel-Dieu de Lévis; Department of Rheumatology; 143 Wolfe Street Lévis QC Canada G6V 3Z1
3. Prapokklao Hospital; Medicine; 58 Prapokklao hospital, Liabnoen road Muang district Chantaburi Thailand 22000
4. Institute for Work & Health; 481 University Avenue, Suite 800 Toronto ON Canada M5G 2E9