1. Cytogenetics Laboratory of the 2nd Department of Pediatrics, Aristotle University, AHEPA Hospital, Thessaloniki, Greece
2. Department of Neonatology, Hippocratic Hospital, Thessaloniki, Greece
3. Department of Biological Chemistry and Molecular Pharmacology, School of Medicine, Harvard University, Boston, MA, USA
4. Caritas St Elizabeth Medical Center, Tufts University, Boston, MA, USA