9.1.2. Blinding
TOTALLY BLIND
Randomization list of subjects was held by the nursing professional, who was the same person responsible for preparing the medication or placebo administered to the participants at both centers. Placebo used was saline solution (2 mL/200U), with the same coloring and appearance as BTxA. All patients, study evaluators, and physicians who applied the botulinum toxin were totally blind.