GPs' classification of headache: is primary headache underdiagnosed? by David Kernick, Sally Stapley, and William Hamilton BJGP Volume 58(547):102-104 February 1, 2008 ©2008 by British Journal of General Practice
Diagnosis of primary headache (cluster, migraine, tension-type), secondary or undifferentiated headache with age as a percentage of total cases. Diagnosis of primary headache (cluster, migraine, tension-type), secondary or undifferentiated headache with age as a percentage of total cases. (n = 91 121). David Kernick et al. Br J Gen Pract 2008;58:102-104 ©2008 by British Journal of General Practice