In the tonsillectomy group, 74 children experienced at least one strep infection after the index date and before age 16.

在扁桃体摘除组，74例儿童在开始日期到16岁之前至少有一次链球菌感染。

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Patients with chronic obstructive pulmonary disease or emphysema were excluded, and all patients were required to have 12-month continuous enrollment before and after the index date.

慢性阻塞性肺疾病或肺气肿患者被排除出本研究。所有患者在上述日期前后需连续12个月参与。

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To date, Index Strategy Maps have been adopted by two companies, Morningstar, Inc. and ETFguide.com.

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