Chronic headache:Appropriate Use of Opiate Analgesics
Neurol 44:S18-S24, Markley,H.G., 1994
Neurologic Complications of Heroin Addiction
Bull NY Acad Sci 49:4, Ritcher,R.W.,et al, 1973
Medical Complications of Cocaine Abuse
NEJM 315:1495-1499, Cregler,L.L.&Mark,H., 1986
Drug Use within an Adolescent Treatment Center
Psych Ann 2:26, 1972 May., Crabtree,L.,et al, 1972