Funding for this research was provided by:
National Natural Science Foundation of China (81771584, 81701441)
Received: 8 November 2019
Accepted: 13 May 2020
First Online: 10 July 2020
Ethics approval and consent to participate
: This study was approved by the ethics committee of the Capital Institute of Pediatrics (SHERLLM 2009002) and was performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. Informed consent Written informed consent was obtained from the patients and/or their guardians prior to sample collection and open sural nerve biopsy.
: All authors declare that they have no confict of interests.