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- [1] The International Society of Paediatric Oncology (SIOP) & the American Society of Pediatric Hematology/Oncology (ASPH/O) - 1999 Joint Meeting - Montreal, Canada - September 13-18, 1999 - SIOP abstracts MEDICAL AND PEDIATRIC ONCOLOGY, 1999, 33 (03): : 145 - 319