The success of the syringe driver.
D004359:Drug Therapy, Combination; D003932:Heroin / Q000008:administration & dosage*; D006801:Humans; D007279:Injections, Subcutaneous; D010148:Intractable Pain / Q000188:drug therapy*; D010166:Palliative Care; D012646:Self Administration / Q000295:instrumentation* / Q000379:methods; D013594:Syringes; D013727:Terminal Care
D003932:Heroin