1. University Clinic for Thoracic and Vascular Surgery, Skopje, Majka Tereza 17, 1000 Skopje, Macedonia (the former Yugoslav Republic of)
2. University Clinic for Thoracic and Vascular Surgery - Medical Faculty Skopje, Macedonia (the former Yugoslav Republic of)
3. University Clinic for Infective Disease and Febrile Conditions - Medical Faculty Skopje, Macedonia (the former Yugoslav Republic of)
4. Institute for Pathology - Medical Faculty Skopje, Macedonia (the former Yugoslav Republic of)
5. University Clinic for Oncology and Radiotherapy- Medical Faculty Skopje, Macedonia (the former Yugoslav Republic of)