Power error.
Weinberger
M
M
Bernstein
S L
SL
D015746:Abdominal Pain / Q000188:drug therapy* / Q000209:etiology; D000701:Analgesics, Opioid / Q000627:therapeutic use*; D003951:Diagnostic Errors; D006801:Humans; D009020:Morphine / Q000627:therapeutic use*; D013223:Statistics as Topic
D000701:Analgesics, Opioid; D009020:Morphine