Of 13 population clusters, seven were randomly allocated to three rounds of screening between 1996 and 2004, while standard care was provided in six (control arm).

在13个人口群中，7个被随机分配到1996年至2004年的3轮筛查，而另外6个（对照组）获得的是标准护理。

youdao

A city of southwest Honshu, Japan, on an arm of the Inland Sea southeast of Hiroshima. It is a naval base and major port. Population, 22 ', 489.

日本本州西南一城市，位于濑户内海的一个海湾上、广岛东南。它是一海军基地和重要港口。人口22 '，489。

youdao

A country of Southeast Asia on the Gulf of Thailand, an arm of the South China Sea. Bangkok is the capital and the largest city. Population: 49,515,074.

泰国，位于泰国湾的一个东南亚国家，泰国湾是中国南海旁边的一个港湾。曼谷是其首都和最大的城市。人口49,515,074。

youdao

In a unique economic experiment, 16 countries with a combined population of 329m have handed over monetary sovereignty to an entity at arm's length from national politics: the European Central Bank (ECB).

ECONOMIST: Holding together

"The General Organization of Radio and TV has served as an arm of the Syrian regime as it mounts increasingly barbaric attacks on its own population and seeks both to mask and legitimize its violence, " the director of the Treasury's Office of Foreign Assets Control, Adam Szubin, said in a statement.

CNN: McCain calls for airstrikes on Syria