685 EFFICACY OF INTRANASAL FENTANYL SPRAY (INFS) VERSUS ORAL TRANSMUCOSAL FENTANYL CITRATE (OTFC) FOR BREAKTHROUGH CANCER PAIN: OPEN‐LABEL CROSSOVER TRIAL
1. University of Palermo, Palermo, Italy;2. Universit?tsklinikum Aachen, Aachen, Germany;3. Research & Development Nycomed, Roskilde, Denmark;4. The Royal Marsden Hospital, Sutton, United Kingdom