nourisson (1) risque (1) association (1) analyse (1) gène (1) enfant (1) Variation (1) Children (1) Social groups (1) Risk (1) Human beings (1) Lymphoblastic leukemia (1) Hispanic Americans (1) Down syndrome (1) Disease susceptibility (1) Chromosomes (1) Children (1) Case-control method (1) Analysis (1) Hispanic Americans (1) Risk factors (1) adolescent (1) nourrisson (1)