1. Department of Microbiology Institute of Biomedicine and Translational Medicine University of Tartu Tartu Estonia
2. Competence Centre on Health Technologies Tartu Estonia
3. Tartu University Hospital, Centre of Andrology Tartu Estonia
4. Department of Epidemiology and Biostatistics National Institute for Health Development Tallinn Estonia
5. Department of Surgery University of Oulu Oulu Finland
6. Department of Surgery Institute of Clinical Medicine University of Tartu Tartu Estonia