5World Health Organization .Symptom relief in terminal illness[J].World Health Organization,Geneva,1998,55-56.
6Reuben DB and Mor V .Dyspnoea in terminally ill cancer patients[J].Chest,1986,89:234-236.
7Reuben DB.Clinical symptoms and length of survival n patients of terminal cancer[J].Archives of Internal Medicine,1988,148:1586-1591.
8E.Duke Dickerson.Dyspnea[A].In: E.Duke Dickerson(eds) Palliative care pocket consultant: A reference guide for symptom management in palliative care[M].1999.29-30.
9Bianchi A.Central control of breathing in mammals :neuronal circuitry,membrane properties,and neurotransmitters[J].Physiological Reviews,1995,75:1-45.
10Robert Twycross,Andrew Wilcock,Respiratory symptom[A] .In: Robert Twycross,Andrew Wilcock(eds) Symptom Management in advanced cancer[M].Oxford:Redcliffe medical press,2002.141-180.
