Affiliation: | University Hospital Zurich and University of Zurich, Zurich, Switzerland (M. Zeeb, D. Weissberg, S.K. Rampini, R. Müller, T. Scheier, W. Zingg, R.D. Kouyos, A. Wolfensberger);Institute of Medical Virology, Zurich, Switzerland (M. Zeeb, R.D. Kouyos) |