1. Enteric Virus Laboratory, Department of Genetics, Microbiology and Statistics, University of Barcelona, Barcelona, Spain
2. Nutrition and Food Safety Research Institute (INSA·UB), University of Barcelona, Barcelona, Spain
3. Department of Infectious Diseases, Geneva University Hospitals, Geneva, Switzerland
4. Enteric Virus Laboratory, Department of Cell Biology, Physiology and Immunology, University of Barcelona, Barcelona, Spain