Article Information
vol. 50 no. 6
PubMed
Published By
Print ISSN
Online ISSN
History
- Received July 26, 2017
- Accepted September 14, 2017
- Published online December 7, 2017.
Copyright & Usage
Copyright ©ERS 2017
Author Information
- Yang Che,
- Qifa Song⇑,
- Tianchi Yang,
- Guohua Ping and
- Mei Yu
- Ningbo Municipal Centre for Disease Control and Prevention, Ningbo, Zhejiang, People's Republic of China
- Q. Song, Ningbo Municipal Centre for Disease Control and Prevention, 237 Yongfeng Road, Ningbo, Zhejiang 315010, People's Republic of China. E-mail: songqf{at}nbcdc.org.cn
Funding
the Natural Science Foundation of Ningbo
no.2015A610195