Opioids and chronic pain.
Russell
Anthony S
AS
Aaron
Stephen L
SL
D000701:Analgesics, Opioid / Q000627:therapeutic use*; D002908:Chronic Disease; D006801:Humans; D010146:Pain / Q000188:drug therapy* / Q000209:etiology; D010166:Palliative Care
D000701:Analgesics, Opioid