Occasionally, a baby under a year dies unexpectedly in sleep, for no apparent reason. This is known as sudden infant death syndrome, or SIDS. Studies have thrown up genes and molecules that are sometimes associated with SIDS deaths, but we're a long way from fully understanding the causes. Now, Nathan Salomonis has created a systems-level model of SIDS, to help researchers see how pathways in the brain, heart and immune system are involved - and to identify new targets for research

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