Received: 11 February 2019
Accepted: 21 August 2019
First Online: 3 September 2019
Ethics approval and consent to participate
: The animal protocol was approved by the Institutional Animal Care and Use Committee of the General Hospital of Chinese People’s Liberation Army and the Academy of Military Medical Sciences in accordance with the National Institutes of Health Guidelines for the Care and Use of Laboratory Animals. No patient was involved.
: Informed consent for publication was obtained from all participants.
: The authors declare that they have no competing interests.