Funding for this research was provided by:
National Natural Science Foundation of China (81602827, 41601548)
Text and Data Mining valid from 2018-09-25
Received: 21 June 2018
Accepted: 20 September 2018
First Online: 25 September 2018
Compliance with ethical standards
: All the authors declare that they have no conflicts of interest.
: All procedures and study protocols were approved by the ethical committee of Tianjin Medical University and were in accordance with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: All the participants within the study provided written informed consent.