System theory of pain and of opiate analgesia: no tolerance to opiates.
Colpaert
F C
FC
Centre de Recherche Pierre Fabre, Castres, France.
D000701:Analgesics, Opioid; D000818:Animals; D004361:Drug Tolerance; D006801:Humans; D010146:Pain / Q000503:physiopathology*
D000701:Analgesics, Opioid