Received: 2 November 2020
Accepted: 24 February 2021
First Online: 4 March 2021
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Zhengzhou Anorectal Hospital and was carried out according to the guidelines of Declaration of Helsinki. This assay was approved by the Animal Research Committee of Zhengzhou Anorectal Hospital and performed in accordance with the guidelines of the National Animal Care and Ethics Institution.
: Not applicable.
: The authors report no conflicts of interest in this work.