Institute for Molecular Infection Biology and Research Centre for Infectious Diseases (ZINF), University of Würzburg, D-97080 Würzburg, Germany Institute for Molecular Infection Biology and Research Centre for Infectious Diseases (ZINF), University of Würzburg, D-97080 Würzburg, Germany.|Institute for Molecular Infection Biology and Research Centre for Infectious Diseases (ZINF), University of Würzburg, D-97080 Würzburg, Germany.|Institute for Molecular Infection Biology and Research Centre for Infectious Diseases (ZINF), University of Würzburg, D-97080 Würzburg, Germany.