1Watson PG.Latanoprost:Two years' experience of its use in the United[M].Kingdom.Ophthalmology,1998.
2Findley I,Chamberlain G.ABC of labour care-relief of pain[J].BMJ,1999,318:927-930.
3Liu EH,Sia AT.Rates of caesarean section and instrumental vaginal delivery in nulliparous women after low concentration epidural infusions or opioid analgesia:systematic revjew[J].BMJ,2004,328(7453):1410.
4van der Vyver M,Halpern 3,Joseph G.Patient controlled epidural analgesia versus continuous infusion for labour analsesia;a meta-analysis[J].Br J Anaesth,2002,89(3):459-465.