1 Third department of pediatrics, Attikon University General Hospital, National and Kapodistrian University of Athens, Rimini 1, Chaidari, 12642 Athens, Greece. Electronic address: [email protected].
2 Department of pediatric surgery, Attikon University General Hospital, National and Kapodistrian University of Athens, Athens, Greece.
3 Laboratory of microbiology, Attikon University General Hospital, National and Kapodistrian University of Athens, Athens, Greece.
4 Third department of pediatrics, Attikon University General Hospital, National and Kapodistrian University of Athens, Rimini 1, Chaidari, 12642 Athens, Greece.
5 Second ENT department, Attikon University General Hospital, National and Kapodistrian University of Athens, Athens, Greece.