Randomization and Blinding
Within 48 hours after symptom onset, eligible patients were randomly assigned in a 1:1 ratio to receive GDLM or placebo by a computerized block randomization method with randomly selected block sizes of 4. The randomization number was stimulated centrally by an independent statistician. The 2 forms of drugs were visually identical and cannot be distinguishable in appearance. Both researchers and patients were blinded to the treatment.