Association between vitamin D deficiency and disease activity in Paraguayan patients with systemic lupus erythematosus Isabel Acosta-Colman; Zoilo Morel; Astrid Paats; Nelson Ortíz; Lourdes Román; Marcos Vázquez; Margarita Duarte; Gabriela Ávila-Pedretti; María Eugenia Acosta; María Teresa Martínez de Filártiga;

Serum interleukin-41 concentrations are decreased in women with rheumatoid arthritis and are not affected by menopausal status, disease activity, or medication Dhuha F.N. Bani-Wais; Ali H. Ad¿hiah;

Association of FokI polymorphism of the VDR gene with systemic lupus erythematosus in an adolescent population of the Colombian Caribbean Gloria Garavito; Luis Fang; Alex Domínguez-Vargas; Ana Moreno-Woo; Guillermo López-Luch; Antonio Iglesias; Gustavo Aroca; Eduardo Egea;