1 Epidemiology, Biostatistics and Prevention Institute, WHO Collaborating Centre for Travellers' Health, University of Zurich, Zurich, Switzerland. [email protected].
2 Competence Centre for Military Medicine and Biology, Hirschengraben 84, 8001, Zurich, Switzerland. [email protected].
3 Wellcome-MRC Cambridge Stem Cell Institute, University of Cambridge, Puddicombe Way, Cambridge, CB2 0AW, UK. [email protected].
4 Epidemiology, Biostatistics and Prevention Institute, WHO Collaborating Centre for Travellers' Health, University of Zurich, Zurich, Switzerland.
5 Competence Centre for Military Medicine and Biology, Hirschengraben 84, 8001, Zurich, Switzerland.