Cluster Headache
BMJ 344:e2407, Nesbitt,A.D.,et al, 2012
Management of Injuries Due to Chemical Weapons
BMJ 302:129-130, Murray,V.S.G.&Volans,G.N., 1991
Central Nervous System Manifestations of Periarteritis Nodosa
Neurol 15:114, Ford,R.G.,et al, 1965