1. Hematology‐Oncology Unit, Fourth Department of Internal Medicine, Attikon Hospital, Medical School National and Kapodistrian University of Athens Athens Greece
2. Department of Surgery, Faculty of Medicine and Health Örebro University Örebro Sweden
3. 2nd Department of Surgery “Korgialenio‐Benakio”, Red Cross General Hospital Athens Greece
4. 1st Propaedeutic Department of Internal Medicine National and Kapodistrian University of Athens Athens Greece
5. Department of Endocrinology Universitatsklinikum Erlangen Erlangen Germany