Funding for this research was provided by:
National Natural Science Foundation of China (71333005)
National Social Science Foundation of China (15ZDC037)
Received: 23 September 2019
Accepted: 27 May 2020
First Online: 5 June 2020
Ethics approval and consent to participate
: This study did not involve any primary data collection and no patients’ privacy data is included.
: Not applicable.
: The authors hold no financial interests in the sponsoring organization. The results described here do not contain any product specific names or literature from the sponsoring company. The authors stated that they have no interests, which might be perceived as posing a conflict or bias.