1. Cytogenetics Laboratory; Genetics Department, Garrahan Pediatrics Hospital; Buenos Aires Argentina
2. Genome Biology Unit; European Molecular Biology Laboratory (EMBL); Heidelberg Germany
3. Institute of Human Genetics, Christian-Albrechts-University Kiel and University Hospital Schleswig-Holstein; Kiel Germany
4. Pathology Department; Garrahan Pediatrics Hospital; Buenos Aires Argentina
5. Laboratory of Molecular Biology; Hematology and Oncology Department, Garrahan Pediatrics Hospital; Buenos Aires Argentina