1. ‘Cantacuzino’ National Medico‑Military Institute for Research and Development, Bucharest 0050096, Romania
2. ‘Carol Davila’ University of Medicine and Pharmacy, Bucharest 050474, Romania
3. Department of Internal Medicine and Rheumatology, Hospital Sfanta Maria, Bucharest 011172, Romania
4. Laboratory of Clinical Virology, Faculty of Medicine, University of Crete, 71003 Heraklion, Crete, Greece