IL-1β and TNFα Promote Monocyte Viability through the Induction of GM-CSF Expression by Rheumatoid Arthritis Synovial Fibroblasts - Christelle Darrieutort-Laffite; Marie-Astrid Boutet; Mathias Chatelais; Régis Brion; Frédéric Blanchard; Dominique Heymann; Benoit Le Goff (Mediators of Inflammation)