As so often, these findings raise as many questions as they answer.For one thing, SIDS is more than twice as common in boys as it is in girls.That sex bias is absent in the mice.

• 正如经常发生的那样，这些研究发现又提出了其所回答的一样多的问题：其一，通常男孩的SIDS的发病率是女孩的两倍多，而在老鼠中，这种性别上的差异不存在。