在一项相关研究中，芝加哥拉什大学医学中心的研究者们发现，许多老年人患有未被诊断的甲状腺疾病，包括甲状腺癌。
In a related study, researchers at Rush University Medical Center in Chicago found that many elderly people have undiagnosed thyroid problems, including thyroid cancer.
但是，一些竞选者质疑早产儿成活率与孕期长短的相关性，他们认为造成早产儿的原因多是胎儿或孕妇本身患有疾病。
But campaigners question the relevance of data on premature babies, many of whom are premature precisely because they, or their mothers, are ill.
根据亚特兰大疾病防控中心的统计，2002年到2006年间，出现相关症状的儿童猛增57%，大约每110名8岁的美国儿童中就有一人患有自闭症。
Diagnoses among children jumped 57% from 2002 to 2006, according to the Centers for Disease Control &Prevention in Atlanta. Roughly 1 in 110 8-year-olds in the U.S. is on the autism spectrum.
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