Received: 19 April 2018
Accepted: 4 February 2019
First Online: 11 February 2019
Ethics approval and consent to participate
: Ethics approval is not required for the cell lines used in this study.All animal experiments conformed to The International Guiding Principles for Biomedical Research Involving Animals and The Hong Kong Code of Practice for Care and Use of Animals for Experimental Purposes. All animal experiments were approved by the Animal Experimentation Ethics Committee of the Chinese University of Hong Kong.
: Not applicable.
: The authors declare that they have no competing interests.
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