GM-CSF drives IL-6 production by macrophages in polymyalgia rheumatica

William F. Jiemy, Anqi Zhang, Wayel H. Abdulahad, Rosanne D. Reitsema, Yannick van Sleen, Maria Sandovici, Guillermo Carvajal Alegria, Divi Cornec, Valérie Devauchelle-Pensec, Patrice Hémon, Baptiste Quéré, S. Boukhlal, Caroline Roozendaal, Thomas C. Kwee, Bhaskar Dasgupta, Arjan Diepstra, Peter Heeringa, Elisabeth Brouwer, Kornelis S. M. van der Geest