1. Department for Infections in the Immunocompromised, University Hospital for Infectious Diseases, 10000 Zagreb, Croatia
2. Department for Viral Hepatitis, University Hospital for Infectious Diseases, 10000 Zagreb, Croatia
3. School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
4. Department for Gastrointestinal Infections, University Hospital for Infectious Diseases, 10000 Zagreb, Croatia