30
Participants
Start Date
June 1, 2020
Primary Completion Date
December 30, 2021
Study Completion Date
March 1, 2022
Human umbilical cord mesenchymal stem cells(HUC-MSCs)
Human umbilical cord mesenchymal stem cells(HUC-MSCs)
Placebo
Placebo
Shanghai East Hospital, Shanghai Tongji University, Shanghai
Shanghai East Hospital
OTHER