. 2011 Jul 20;14(7):581–587. [Article in Chinese] doi: 10.3779/j.issn.1009-3419.2011.07.04
版权所有©《中国肺癌杂志》编辑部2017
Copyright ©2017 Chinese Journal of Lung Cancer. All rights reserved.
This is an open access article distributed in accordance with the terms of the Creative Commons Attribution (CC BY 3.0) License. See: https://creativecommons.org/licenses/by/3.0/
1.
病例组和对照组年龄分布图
The distribution of age in case arm and control arm