Presence of endogenous opiate alkaloids.
Spector
S
S
Neuroscience Department, Roche Institute of Molecular Biology, Nutley, New Jersey 07110.
Marcum
E
E
Haberman
F
F
D000818:Animals; D003061:Codeine / Q000032:analysis*; D006801:Humans; D007118:Immunoassay; D009020:Morphine / Q000032:analysis*
D009020:Morphine; D003061:Codeine