1st Department of Internal Medicine, Thriasio Elefsis General Hospital, Elefsina, Attiki, Greece
Clinic of Intensive Care and Pulmonary Diseases, Aghioi Anargyroi Kifissia General Oncologic Hospital, Kifissia, Attiki, Greece
Intensive Care Unit, Herakleion University General Hospital, Heraklion, Crete, Greece
Department of Internal Medicine, General Hospital of Argolida, Argos, Greece
4th Department of Internal Medicine, ATTIKON University General Hospital, Athens, Greece
Obstructive Diseases Clinic, Sotiria Athens Hospital of Chest Diseases, Athens, Greece
2nd Department of Internal Medicine, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
1st Department of Internal Medicine, General Hospital of Athens G. GENNIMATAS, Athens, Greece
1st Department of Internal Medicine, General Hospital of Voula ASKLEPIEIO, Athens, Greece
1st Department of Internal Medicine - General Hospital of Athens "Sismanogleio-Amalia Fleming", Athens, Greece
1st Department of Internal Medicine, AHEPA University General Hospital of Thessaloniki, Athens, Greece
1st Department of Internal Medicine, EVANGELISMOS Athens General Hospital, Athens, Greece
4th Department of Internal Medicine,"Attikon" University Hospital, National and Kapodistrian University of Athens, Medical School, Chaïdári, Attiki, Greece
1st Department of Internal Medicine, General Hospital of Eleusis THRIASIO, Athens, Greece
3rd Department of Internal Medicine, General Hospital of Nikaia AGIOS PANTELEIMON, Nikaia, Greece
Out-patient long-COVID department, Jena University Hospital, Jena, Germany
Out-patient long-COVID department, Patras University General Hospital, Patra, Achaia, Greece
Out-patient long-COVID department III, Evangelismos Athens General Hospital, Athens, Attiki, Greece
3rd University Department of Internal Medicine, Sotiria Athens General Hospital, Athens, Greece
1st Department of Internal Medicine - General Hospital of Athens Sismanoglio- Amalia Fleming, Athens, Greece
3rd Department of Internal Medicine - General State Hospital of Nikaia "Saint Panteleimon" - West Attica General Hospital "Agia Varvara", Athens, Greece
General Hospital of Elefsina 1st Department of Internal Medicine, ElefsÃna, Greece
Emergency Department of ATTIKON University General Hospital, Attiki, Chaidari, Greece
Emergency Department of Tzaneion General Hospital, Attiki, Piraeus, Greece
6th Department of Pulmonary Medicine, SOTIRIA General Hospital of Chest Diseases of Athens, Athens, Greece
1st Department of Internal Medicine, General Hospital of Athens GENNIMATAS, Athens, Greece
3rd Department of Internal Medicine, General Hospital of Nikaia AGIOS PANTELEIMON, Nikaia, Greece
2nd Department of Internal Medicine, University General Hospital of Alexandroupolis, Alexandroupoli, Greece
2nd Department of Internal Medicine, Tzanneion General Hospital, Piraeus, Greece
1st Department of Internal Medicine, AHEPA University General Hospital of Thessaloniki, Thessaloniki, Greece