Kako, Jun Response to "Prophylactic Fentanyl Sublingual Spray for Episodic Exertional Dyspnea in Cancer Patients: A Pilot Double-Blind Randomized Controlled Trial". [electronic resource] - Journal of pain and symptom management 10 2019 - e16-e17 p. digital Publication Type: Letter; Comment ISSN: 1873-6513 Standard No.: 10.1016/j.jpainsymman.2019.07.020 doi Subjects--Topical Terms: Analgesics, OpioidDouble-Blind MethodDyspneaFentanylHumansNeoplasms