Letter from North America: The United States government's comparative effectiveness research program.
作者信息
Sakala Carol
机构信息
Childbirth Connection, 281 Park Avenue South, New York, New York 10010, USA.
出版信息
Birth. 2009 Dec;36(4):342-4. doi: 10.1111/j.1523-536X.2009.00364.x.
Abstract
摘要
Zotero 插件