Headaches in PregnancySemin Neurol 8:187-192, Reik,L., 1988
Toxidrome Recognition in Chemical - Weapons AttacksNEJM 378:1611-1620, Ciottone, G.R., 2018
Chronic headache:Appropriate Use of Opiate AnalgesicsNeurol 44:S18-S24, Markley,H.G., 1994