17
Participants
Start Date
October 31, 2016
Primary Completion Date
December 28, 2017
Study Completion Date
January 22, 2018
Botulinum toxin type A
50 units of botulinum toxin diluted in 1 ml of normal saline will be administered. 0.1mlof BTA will be injected with a 30G needle.
normal saline
0.1mlof normal saline will be injected with a 30G needle.
Xijing Hospital, Xi'an
Xijing Hospital
OTHER