1. Flow Cytometry Service; Service Department; IRCCS Foundation Ca’ Granda Ospedale Maggiore Policlinico; Milan Italy
2. Pediatric Hematology and Oncology Unit; Oncology Department; A.R.N.A.S. Ospedale Civico Di Cristina e Benfratelli; Palermo Italy
3. Pediatric Hematology; IRCCS Foundation Ca’ Granda Ospedale Maggiore Policlinico; Milan Italy
4. Pediatric Unit; Azienda Ospedaliera Spedali Civili; Brescia Italy
5. Pediatric Oncology and Onco-Hematology Unit; Azienda Ospedaliero Universitaria Policlinico Giovanni XXIII; Bari Italy
6. Laboratory of Medical Statistics; Biometry and Epidemiology; Department of Clinical Sciences and Community Health; University of Milan; Milan Italy
7. Blood Transfusion Center; IRCCS Foundation Ca’ Granda Ospedale Maggiore Policlinico; Milan Italy