The −844 G/A PAI-1 polymorphism is associated with mRNA expression in rheumatoid arthritis. - Torres-Carrillo, Nora Magdalena; Torres-Carrillo, Norma; Vázquez-Del Mercado, M&x00F3;nica; Delgado-Rizo, Vidal; Oregón-Romero, Edith; Parra-Rojas, Isela; Muñoz-Valle, José Francisco (Rheumatology International, 2008)