LatinovicR, GullifordM, RidsdaleL. Headache and migraine in primary care: consultation, prescription, and referral rates in a large population. J Neurol Neurosurg Psychiatry2006; 77: 385–7.
2.
De DiegoEV, Lanteri-MinetM. Recognition and management of migraine in primary care: influence of functional impact measured by the headache impact test (HIT). Cephalalgia2005; 25: 184–90.
3.
KhuJV, SiowHC, HoKH. Headache diagnosis, management and morbidity in the Singapore primary care setting: findings from a general practice survey. Singapore Med J2008; 49: 774–9.
4.
BeckerWJ, FindlayT, MogaC. Guideline for primary care management of headache in adults. Can Fam Physician2015; 61: 670–9.
5.
IckensteinGW, KlotzJM, LangohrHD. [Headache caused by polycythemia vera. Classification of a headache under the heading of metabolic disturbances] Schmerz 1999; 13: 279–82.
6.
FrewinR, DowsonA. Headache in essential thrombocythaemia. Int J Clin Pract2012; 66: 976–83.
