1. Unit of Pediatric Hematology and Oncology, Chu Purpan, 31059 Toulouse, Cedex, France
2. Department of Pediatric Surgery, Chu Purpan, 31059 Toulouse, Cedex, France
3. Department of Radioisotopic, Chu Purpan, 31059 Toulouse, Cedex, France
4. Unit of Pediatric Nephrology, Chu Purpan, 31059 Toulouse, Cedex, France