1. Department of Doctoral Studies, Rīga Stradiņš University, LV-1007 Riga, Latvia
2. Institute of Microbiology and Virology, Rīga Stradiņš University, Rātsupītes St. 5, LV-1067 Riga, Latvia
3. Joint Laboratory of Traumatology and Orthopaedics, Rīga Stradiņš University, LV-1005 Riga, Latvia
4. Hospital of Traumatology and Orthopaedics, Duntes St. 22, LV-1005 Riga, Latvia
5. Department of Internal Diseases, Rīga Stradiņš University, LV-1007 Riga, Latvia
6. Joint Laboratory of Electron Microscopy, Institute of Anatomy and Anthropology, Rīga Stradiņš University, Kronvalda blvd 9, LV-1010 Riga, Latvia