1. Department of Pathophysiology, School of Dental Medicine University of Belgrade Belgrade Serbia
2. Central Library, School of Dental Medicine University of Belgrade Belgrade Serbia
3. Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam University of Amsterdam and Vrije Universiteit Amsterdam the Netherlands
4. Department of Endodontics, Academic Centre for Dentistry Amsterdam University of Amsterdam and Vrije Universiteit Amsterdam the Netherlands
5. Laboratory for Basic Science, School of Dental Medicine University of Belgrade Belgrade Serbia
6. Department of Endodontics, School of Dental Medicine Case Western Reserve University Cleveland Ohio USA
7. Department of Preventive and Restorative Dentistry, College of Dental Medicine University of Sharjah Sharjah UAE