Liu, Hongbo
Yao, Yangyang
Xu, Suyun
Funding for this research was provided by:
Bill and Melinda Gates Foundation (RTTC China 2014)
Article History
Received: 13 November 2017
Accepted: 15 February 2018
First Online: 1 March 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.