Vitamin D levels in patients with small and medium vessel vasculitis Fatma Nur Korkmaz; Gulsen Ozen; Ali Ugur Unal; Asli Odabasi; Meryem Can; Ebru As¿c¿oglu; Serhan Tuglular; Haner Direskeneli;

Association between hypothyroidism and elderly-onset rheumatoid arthritis: A cross-sectional study at national hospital in Peru Paul J. Tejada-Llacsa; Vidia Lumbe Diaz; Carlos Diaz-Arocutipa;

Survival of first line biological and targeted synthetic disease-modifying anti-rheumatic drugs in patients with rheumatoid arthritis in Chile Marcos Cruces Olivar; Allan D. Burboa; Yolanda M. Gómez;