Cluster Headache
BMJ 344:e2407, Nesbitt,A.D.,et al, 2012
Chronic Paroxysmal Hemicrania:A Disabling Headache Syndrome Responding to Indomethacin
Ann Neurol 3:183, Price,R.W.,et al, 1978
Hemicrania Continua is Not That Rare
Neurol 57:948-951, Peres,M.F.P.,et al, 2001