1 Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands.
2 Institute of Innate Immunity, Bonn University, Bonn, Germany, the Department of Infectious Diseases and Immunology, UMass Medical School, Worcester, Massachusetts, USA, and the German Center for Neurodegenerative Diseases, Bonn, Germany.
3 School of Biochemistry and Immunology, Trinity College, Dublin, Ireland.