[Irrefutable evidence-based medicine. Morphine is ineffective as an analgesic?].
Wiedemann
B
B
D000701:Analgesics, Opioid / Q000627:therapeutic use*; D001416:Back Pain / Q000188:drug therapy*; D015982:Bias; D002986:Clinical Trials as Topic / Q000706:statistics & numerical data*; D019317:Evidence-Based Medicine; D006801:Humans; D009020:Morphine / Q000627:therapeutic use*; D017211:Treatment Failure
D000701:Analgesics, Opioid; D009020:Morphine