Two phase III clinical trials have offered conflicting results, and an independent advisory panel convened by the US Food and Drug Administration to assess the drug's effectiveness says that the data do not support its use.

两项 III 期临床试验提供了相互矛盾的结果，美国食品和药物管理局召集的独立顾问小组评估该药物的有效性表示， 数据不支持其使用。