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