Disorders of the Nervous System Caused by Drugs, Toxins, and Chemical Agents, Opiates and Synthetic Analgesic Drugs
Adams & Victors Principles of Neurology Chp 43, pg 1201, Ropper, A.H.,et al, 2014
Neurologic Complications of Endocarditis in Persons Taking Drugs Intravenously
West J Med 124:276, Openshaw,H., 1976