Funding for this research was provided by:
Advanced and Appropriate Technology Promotion Projects of Shanghai Municipal Health Commission (2019SY058)
Received: 26 July 2019
Accepted: 3 December 2019
First Online: 19 December 2019
Compliance with ethical standards
: Yimei Jiang, Zijia Song, Xi Cheng, Kun Liu, Yiqin Shi, Changgang Wang, You Li, Xiaopin Ji, and Ren Zhao have no conflicts of interest or financial ties to disclose.