Morphine analgesia--why does it vary from patient to patient?
D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D006801:Humans; D008875:Middle Aged; D009020:Morphine / Q000378:metabolism / Q000627:therapeutic use*; D010146:Pain / Q000188:drug therapy*; D010148:Intractable Pain / Q000188:drug therapy
D009020:Morphine