FRI0242 A large multicentre comparative efficacy, tolerability and quality of life trial between tts fentanyl and sustained release morphine, in strong-opioid naÏve patients with chronic low back pain
FRI0242 A large multicentre comparative efficacy, tolerability and quality of life trial between tts fentanyl and sustained release morphine, in strong-opioid naÏve patients with chronic low back pain