1. Alfa Institute of Biomedical Sciences (AIBS), Athens, Greece.
2. Department of Neurosurgery, Agios Savvas Regional Cancer Hospital, Athens, Greece.
3. Department of Medicine, Karolinska Institutet and University Hospital, Stockholm, Sweden.
4. Department of Medicine–Infectious Diseases, Iaso General Hospital, Athens, Greece.
5. Department of Medicine, Tufts University School of Medicine, Boston, Massachusetts.