"Alexandra" General Hospital, Athens, Greece
National and Kapodistrian University of Athens, Athens, Greece
Evangelismos Hospital, Athens, Greece
Hippocration Hospital- Aristotle University School of Medicine, Thessaloniki, Greece
General Hospital of Athens Korgialeneio Mpenakeio Hellenic Red Cross, Athens, Greece
General University Hospital of Alexandroupolis, Alexandroupoli, Greece
Metaxa Memorial General Hospital, Athens, Greece
University Hospital of Patras, Patra, Greece
Venizeleion Hospital, Heraklion, Crete, Greece
Medical School of National and Kapodistrian University of Athens School of Health Sciences- General Hospital of Athens "Laiko"- Athens- Greece, Athens, Greece
Gastroenterology Unit University Hospital, Ioannina, Greece
Hippokratio General Hospital, Athens, Greece
University Hospital of Heraklion- Medical School University of Crete, Heraklion- Crete, Greece
401 Army General Hospital of Athens, Athens, Greece
'Konstantopoulio-Patission' General Hospital, Athens, Greece
General Hospital Nikaias-Piraeus 'Agios Panteleimon'-General Hospital Dytikis Attikis "Agia Varvara"- Athens- Pireaus- Greece, Athens, Greece
Tzaneion General Hospital, Athens, Greece
Chania General Hospital, Chania, Greece
Euroclinic Group, Athens, Greece
Medical School- National and Kapodistrian University of Athens- Attikon University General Hospital- Athens, Hepatogastroenterology Unit, Athens, Greece
Theageneio Cancer Hospital of Thessaloniki, Thessaloniki, Greece
General Hospital Of Kavala, Greece, Kavala, Greece