The role of macrophages in IL-4 receptor (IL-4R)-dependent pathology in pulmonary cryptococcosis (Uwe Müller, W. Stenzel, Daniel Piehler, Andreas Grahnert, Martina Protschka, G. Köhler, O. Frey, J. Held, Tina Richter, Maria Eschke, Thomas Kamradt, F. Brombacher, Gottfried Alber)