Cluster HeadacheBMJ 344:e2407, Nesbitt,A.D.,et al, 2012
Acute and Preventive Pharmacologic Treatment of Cluster HeadacheNeurol 75:463-473, Francis,G.J., et al, 2010
Trpitans in MigraineNeurol 62:563-568, Hall,G.C.,et al, 2004