Table 1.

Headache services organised on three levels [7]

Level 1. General primary care	• Frontline headache services (accessible first contact for most people with headache)
	• Ambulatory care delivered by primary health-care providers
	• Referring when necessary, and acting as gatekeeper, to:
Level 2. Special-interest headache care	• Ambulatory care delivered by physicians with a special interest in headache
	• Referring when necessary to:
Level 3. Headache specialist centres	• Advanced multidisciplinary care delivered by headache specialists in hospital-based centres