1. Laboratory of Viruses Contaminants of Water and Food, Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Barcelona, Catalonia, Spain
2. The Water Research Institute (IdRA), Universitat de Barcelona, Barcelona, Catalonia, Spain
3. Catalan Institute for Water Research (ICRA), Girona, Catalonia, Spain
4. Universitat de Girona, Girona, Catalonia, Spain