Surveillance of global, travel-related illness using a novel app: a multivariable, cross-sectional study oleh Martin Peter Grobusch, Frank Mockenhaupt, Hiroshi Nishiura, Patricia Schlagenhauf, Effy Vayena, Philippe Gautret, Jaffar A Al-Tawfiq, Thibault Lovey, Nadja Hedrich, Julian Bernhard, Ulf Blanke, Gilles Eperon, Albie de Frey, Esther Kuenzli, Andreas Lindner, Corneliu Popescu, Jenny L Schnyder, Hanna K de Jong, Mohammed Dauda, Salim Parker, Carsten Schade Larsen