Parlow JL , Milne B , Tod DA , Stewart GJ , Griffiths JM and Dudgeon DJ . Self-administered nitrous oxide for the management of incident pain in terminally ill patients . Palliative Medicine2005; 19: 3–8 .
2.
Farrar JT , Cleary J , Rauck R , Busch M , Nordbrock E.Oral transmucosal fentanyl citrate: randomized, double-blinded, placebo-controlled trial for treatment of breakthrough pain in cancer patients . Journal of the National Cancer Institute1998; 90: 611–616 .
3.
Coluzzi PH , Schwartzberg L , Conroy JD , Charapata S , Gay M , Busch MA , Chavez J , Ashley J , Lebo D , McCracken M , Portenoy RK . Breakthrough cancer pain: a randomized trial comparing oral transmucosal fentanyl citrate (OTFC) and morphine sulfate immediate release (MSIR) . Pain2001; 91: 123–130 .
