Funding for this research was provided by:
National Science and Technology Major Project of China (2017ZX10202101-003, 2017ZX10301101-001 and 2017ZX09309008-003)
State Key Laboratory of Infectious Disease Prevention and Control (2015SKLID506)
National Natural Science Foundation of China (81271826, 81201286)
Received: 19 July 2017
Accepted: 18 May 2018
First Online: 4 June 2018
Ethics approval and consent to participate
: The study was approved by the institutional review authorities of Peking University Health Science Center (Approval ID: PKUPHLL20090011). All patients provided written informed consent before enrollment in the study.
: The authors declare that they have no competing interests.
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