1 Department of Pediatric Hematology- Oncology, Agia Sofia Children's Hospital, Athens, Greece.
2 Department of Haematology, National and Kapodistrian University of Athens, School of Medicine, Laikon General Hospital, Athens, Greece.
3 Second Department of Surgery, Propedeutic, National and Kapodistrian University of Athens, School of Medicine, Laikon General Hospital, Athens, Greece.
4 Department of Nuclear Medicine, HYGEIA Hospital, Athens, Greece.
5 Department of Nuclear Medicine and PET/CT, Evangelismos General Hospital, Athens, Greece.
6 Department of Pediatric Cardiac Surgery, Agia Sofia Children's Hospital, Athens, Greece.
7 Department of Hematology, Athens Medical Center, Athens, Greece.