Since then, several studies have evaluated botulinum toxin as a migraine preventative.
Since then, several studies have evaluated botulinum toxin as a migraine preventative.
在这之后，数项研究都评定肉毒杆菌毒素是一种偏头痛预防药物。
Since then, several studies have evaluated botulinum toxin as a migraine preventative.
在这之后，数项研究都评定肉毒杆菌毒素是一种偏头痛预防药物。