aDepartment of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens
bDepartment of Pediatric Hematology-Oncology, ‘Pan. & Agl. Kyriakou’ Children’s Hospital
cDepartment of Pediatric Hematology-Oncology, ‘Agia Sofia’ Children’s Hospital, Athens, Greece
dDepartment of Clinical Oncology, Federal Scientific and Clinical Center of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, Moscow, Russian Federation
eDepartment for Pediatric Hematology and Oncology, University Children Hospital Ljubljana, Ljubljana, Slovenia
fPediatric Hematology/Oncology Unit, First Department of Pediatrics, University of Athens, ‘Agia Sofia’ Children’s Hospital, Athens
gDepartment of Pediatric Hematology and Oncology, Hippokration Hospital, Thessaloniki
hDepartment of Pediatric Hematology-Oncology, University of Crete, Heraklion
iHematology-Oncology Unit, 2nd Pediatric Department, Aristotle University of Thessaloniki, AHEPA Hospital, Thessaloniki
jPediatric Hematology-Oncology Department, ‘Mitera’ Children’s Hospital
kDepartment of Pathology, Children’s Hospital ‘Aghia Sofia’
lDepartment of Imaging, National and Kapodistrian University of Athens
mDepartment of Neurosurgery, Children’s Hospital ‘Aghia Sophia’
nPathology Laboratory, ‘P & A. Kyriakou’ Children’s Hospital, Athens
oDepartment of Hygiene and Epidemiology, School of Medicine, University of Ioannina, Ioannina, Greece
pCenter for Evidence Synthesis in Health, Brown University School of Public Health, Providence, RI, USA
qClinical Epidemiology Unit, Department of Medicine, Karolinska Institute, Stockholm, Sweden
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Correspondence to Eleni Th. Petridou, MD, MPH, PhD, Department of Hygiene, Epidemiology and Medical Statistics, National and Kapodistrian University of Athens, 75 Mikras Asias Str, Athens 11527, Greece, Tel: +30 210 7462187; e-mail: [email protected]
