1. Molecular Physics Laboratory, Ruđer Bošković Institute, Bijenicka, Zagreb, Croatia.
2. Department of Prosthodontics, Dental Policlinic Zagreb, Perkovceva, Zagreb, Croatia.
3. Department of Oral Medicine, School of Dental Medicine, University of Zagreb, Gunduliceva, Zagreb, Croatia.
4. Department of Clinical Microbiology, University Hospital for Infectious Diseases “Dr Fran Mihaljević,” Mirogojska, Zagreb, Croatia.
5. University Hospital “Sestre milosrdnice,” Division of Gastroenterology, Department of Internal Medicine, Vinogradska, Zagreb, Croatia.