The inestigators beliee that the risk-benefit ratio makes low-dose morphine sulfate a credible therapeutic option for patients with chronic cough who fail other specific treatments.

• 研究人员相信风险/受益比率使低剂量硫酸吗啡成为对其他特效治疗无效的慢性咳嗽患者的一种可靠的治疗选择。