Increased acinar damage of salivary glands of patients with Sjögren's syndrome is paralleled by simultaneous imbalance of matrix metalloproteinase 3/tissue inhibitor of metalloproteinases 1 and matrix metalloproteinase 9/tissue inhibitor of metalloproteinases 1 ratios. - Pérez P; Kwon Y; Alliende C; Leyton L; Aguilera S; Molina C; Labra C; Julio M; Leyton C; González M (Arthritis & Rheumatism, 2005)