1. Hematology Laboratory; Bechir Hamza Children's Hospital; Tunis Tunisia
2. Biochemistry Laboratory; Bechir Hamza Children's Hospital; Tunis Tunisia
3. Department of Pediatrics; Tahar Sfar University Hospital; Mahdia Tunisia
4. Division of Angiology and Haemostasis; University Hospitals and Faculty of Medicine of Geneva; Geneva Switzerland
5. Department of Clinical Biology A; Faculty of Pharmacy; Monastir Tunisia