Received: 20 June 2018
Revised: 4 December 2018
Accepted: 13 December 2018
First Online: 10 January 2019
Ethics approval and consent to participate
: Animals used in this study were housed in a specific pathogen-free animal facility, and all experimental procedures described in this report have been approved by Animal Care and Use Committee (ID of Animal Experimental Ethical Inspection: ACUC-A01-2013-029 and ACUC-A01-2013-028) at the Center for Experimental Animal Research, Institute of Basic Medical Sciences, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College.
: Not applicable.
: The authors declare that they have no competing interests.
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