Dystonia
NEJM 355:818-829, Tarsy,D. &Simon,D.K., 2006
The Risk-Benefit Profile of Commonly Used Herbal Therapies: Ginkgo, St. John's Wort, Genseng, Echinacea, Saw Palmetto, and Kava
Ann Int Med 136:42-53, Ernst,E., 2002
Life-Threatening Cranial Dystonia Following Trihexyphenidyl Withdrawal
Movement Disorders 4:349-353, Gimenez-Roldan,S.,et al, 1989